Part of #27065

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>

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>

* Refactor AssertExistsAndLoadBean to use generics

* Fix tests

Co-authored-by: zeripath <art27@cantab.net>

* Some refactors related repository model

* Move more methods out of repository

* Move repository into models/repo

* Fix test

* Fix test

* some improvements

* Remove unnecessary function

* Move user related model into models/user

* Fix lint for windows

* Fix windows lint

* Fix windows lint

* Move some tests in models

* Merge

* go build / format tools
* re-format imports

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

* Move db related basic functions to models/db

* Fix lint

* Fix lint

* Fix test

* Fix lint

* Fix lint

* revert unnecessary change

* Fix test

* Fix wrong replace string

* Use *Context

* Correct committer spelling and fix wrong replaced words

Co-authored-by: zeripath <art27@cantab.net>

* chore: rewrite format.

* chore: update format

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

* chore: update format

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

* chore: Adjacent parameters with the same type should be grouped together

* chore: update format.

* make repo as "pending transfer" if on transfer start doer has no right to create repo in new destination

* if new pending transfer ocured, create UI & Mail notifications