Currently 'userxx' and 'orgxx' are both used as username in test files
when the user type is org, which is confusing. This PR replaces all
'userxx' with 'orgxx' when the user type is org(`user.type==1`).
Some non-trivial changes
1. Rename `user3` dir to `org3` in `tests/git-repositories-meta` 
2. Change `end` in `issue reference` because 'org3' is one char shorter
than 'user3'

![ksnip_20230913-112819](https://github.com/go-gitea/gitea/assets/70063547/442988c5-4cf4-49b8-aa01-4dd6bf0ca954)
3. Change the search result number of `user/repo2` because
`user3/repo21` can't be searched now

![ksnip_20230913-112931](https://github.com/go-gitea/gitea/assets/70063547/d9ebeba4-479f-4110-9a85-825efbc981fd)
4. Change the first org name getting from API because the result is
ordered by alphabet asc and now `org 17` is before `org25`
![JW8U7NIO(J$H
_YCRB36H)T](https://github.com/go-gitea/gitea/assets/70063547/f55a685c-cf24-40e5-a87f-3a2327319548)
![)KFD411O4I8RB5ZOH7E0
Z3](https://github.com/go-gitea/gitea/assets/70063547/a0dc3299-249c-46f6-91cb-d15d4ee88dd5)

Other modifications are just find all and replace all.
Unit tests with SQLite are all passed.

---------

Co-authored-by: caicandong <1290147055@qq.com>

Fixes #22666 (Replace #22668)

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: KN4CK3R <admin@oldschoolhack.me>
Co-authored-by: zeripath <art27@cantab.net>

Fixes #22628

This PR adds cross references for commits by using the format
`owner/repo@commit` . References are rendered like
[go-gitea/lgtm@6fe88302](#dummy).

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

Change all license headers to comply with REUSE specification.

Fix #16132

Co-authored-by: flynnnnnnnnnn <flynnnnnnnnnn@github>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>

It doesn't make sense to ignore the pattern again and again.

Add nakedret, unconvert, wastedassign, stylecheck and nolintlint linters to improve code readability

- nakedret - https://github.com/alexkohler/nakedret - nakedret is a Go static analysis tool to find naked returns in functions greater than a specified function length.
- unconvert - https://github.com/mdempsky/unconvert - Remove unnecessary type conversions
- wastedassign - https://github.com/sanposhiho/wastedassign -  wastedassign finds wasted assignment statements.
- notlintlint -  Reports ill-formed or insufficient nolint directives
- stylecheck - https://staticcheck.io/docs/checks/#ST - keep style consistent
  - excluded: [ST1003 - Poorly chosen identifier](https://staticcheck.io/docs/checks/#ST1003) and [ST1005 - Incorrectly formatted error string](https://staticcheck.io/docs/checks/#ST1005)

* Implement custom regular expression for external issue tracking.

Signed-off-by: Alexander Beyn <malex@fatelectrons.org>

* Fix syntax/style

* Update repo.go

* Set metas['regexp']

* gofmt

* fix some tests

* fix more tests

* refactor frontend

* use LRU cache for regexp

* Update modules/markup/html_internal_test.go

Co-authored-by: Alexander Beyn <malex@fatelectrons.org>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

* gofumpt -w -l .

* gofumpt -w -l -extra .

* Add linter

* manual fix

* change make fmt

* Add API to get issue/pull comments and events (timeline)
Adds an API to get both comments and events in one endpoint with all required data.
Closes go-gitea/gitea#13250

* Fix swagger

* Don't show code comments (use review api instead)

* fmt

* Fix comment

* Time -> TrackedTime

* Use var directly

* Add logger

* Fix lint

* Fix test

* Add comments

* fmt

* [test] get issue directly by ID

* Update test

* Add description for changed refs

* Fix build issues + lint

* Fix build

* Use string enums

* Update swagger

* Support `page` and `limit` params

* fmt + swagger

* Use global slices

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

Remove repeated type declarations in function definitions.

* Fix various doc, user-facing, and source comment typos

Found via `codespell -q 3 -S ./options/locale,./vendor -L ba,pullrequest,pullrequests,readby`

* Fuzzer finds an NPE due to incorrect URLPrefix

The Fuzzer is running on a non-repo urlprefix which is incorrect for RenderRaw


* Make FindRenderizableReferenceNumeric and getReferences more efficient

Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

* Respect merge message structure for parsing item references

Signed-off-by: JustusBunsi <61625851+justusbunsi@users.noreply.github.com>
Co-authored-by: zeripath <art27@cantab.net>

* _ to unused func options

* rm useless brakets

* rm trifial non used models functions

* rm dead code

* rm dead global vars

* fix routers/api/v1/repo/issue.go

* dont overload import module

* Add mentionable teams to tributeValues

Signed-off-by: a101211279 <1012112796@qq.com>

* Apply suggestions from code review

Co-authored-by: silverwind <me@silverwind.io>

* Change team mention rules to gh's style

* use org's avator as team avator in ui

Signed-off-by: a101211279 <1012112796@qq.com>

* Update modules/markup/html.go

* Update models/issue.go

Co-authored-by: Lauris BH <lauris@nix.lv>

* Update models/issue.go

* fix a small nit and update test code

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: 6543 <6543@obermui.de>

* Fix panic bug in handling multiple references in commit

The issue lay in determining the position of matches on a second run round
a commit message in FindAllIssueReferences.

Fix #13483

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Extract function and make testable

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Fix the comment

Signed-off-by: Andrew Thornton <art27@cantab.net>

* cleaning up the comments a bit more

Signed-off-by: Andrew Thornton <art27@cantab.net>

Fix #10269

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Support references ending in , . and ;

* Accept :;, in simple refs; fix 2+ consecutive refs

* Include cross-repository references

* Add ?!, fix spacing problem

* Move to goldmark

Markdown rendering moved from blackfriday to the goldmark.

Multiple subtle changes required to the goldmark extensions to keep
current rendering and defaults.

Can go further with goldmark linkify and have this work within markdown
rendering making the link processor unnecessary.

Need to think about how to go about allowing extensions - at present it
seems that these would be hard to do without recompilation.

* linter fixes

Co-authored-by: Lauris BH <lauris@nix.lv>

* Add support for local vs. remote xrefs

* Add doc for references

* Docs: fix cases not currently supported

* One more doc fix

* Doc: mentions for teams and orgs

* Change !num ref concept, no change in functionality

* Fix test

* Improve table of issue reference types

* Fix paragraph mark

* Add close/reopen from comment functionality

* Fix comment

* Rewrite closing/reopening template

* Check xref permissions, move action to services/pull

* Fix RefIsPull field

* Add xref tests

* Fix xref unique filter

* Only highlight keywords for actionable xrefs

* Fix xref neuter filter

* Fix check return status

* Restart CI

* Enable punctuations ending mentions

* Improve tests

* Add settings for CloseKeywords and ReopenKeywords

* Fix and improve tests

* Use sync.Once() for initialization

* Fix unintended exported function

* Add a markdown stripper for mentions and xrefs

* Improve comments

* Small code simplification

* Move reference code to modules/references

* Fix typo

* Make MarkdownStripper return [][]byte

* Implement preliminary keywords parsing

* Add FIXME comment

* Fix comment

* make fmt

* Fix permissions check

* Fix text assumptions

* Fix imports

* Fix lint, fmt

* Fix unused import

* Add missing export comment

* Bypass revive on implemented interface

* Move mdstripper into its own package

* Support alphanumeric patterns

* Refactor FindAllMentions

* Move mentions test to references

* Parse mentions from reference package

* Refactor code to implement renderizable references

* Fix typo

* Move patterns and tests to the references package

* Fix nil reference

* Preliminary rendering attempt of closing keywords

* Normalize names, comments, general tidy-up

* Add CSS style for action keywords

* Fix permission for admin and owner

* Fix golangci-lint

* Fix golangci-lint