Backport #27200 by @silverwind

- Update all JS and Poetry dependencies
- Remove deprecated `eslint-plugin-custom-elements` and replace it with
rules from `eslint-plugin-wc`
- Add a convenience `make update` to update both js and py dependencies
- Tested markdown toolbar, swagger and citation

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

I forgot to lock `yamllint` to exact version, so did that and
regenerated `poetry.lock` as well.

So that https://github.com/go-gitea/gitea/pull/26964 does not happen
again. Merge this after that PR. Config is based on
[node's](https://github.com/nodejs/node/blob/main/.yamllint.yaml).

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Co-authored-by: techknowlogick <techknowlogick@gitea.com>

Enable `H008 | Attributes should be double quoted` and fix issues.

- Update all JS and PY dependencies minus
`eslint-plugin-eslint-comments` (because of
https://github.com/eslint-community/eslint-plugin-eslint-comments/issues/89)
- Regenerate SVGs
- Remove depreacted eslint rule
- Tested mermaid and swagger

New rules enabled as the bugs I reported were fixed:

- H026 | Empty id and class tags can be removed.
- T027 | Unclosed string found in template syntax.

Refs:

https://github.com/Riverside-Healthcare/djLint/issues/711
https://github.com/Riverside-Healthcare/djLint/issues/712

Enable these rules:

- H014 | More than 2 blank lines.
- H023 | Do not use entity references.

There are more potential rules to enable but they are blocked by bugs in
the linter:

- https://github.com/Riverside-Healthcare/djLint/issues/711
- https://github.com/Riverside-Healthcare/djLint/issues/712

[updates](https://github.com/silverwind/updates) now supports poetry as
well so we can use it for a new `make poetry-update` to update all
poetry dependencies.

- Reduce `pyproject.toml` and `package.json` to the minimal required
format, removing unneeded properties. `build-system` is not needed as
per
[this](https://github.com/python-poetry/poetry/issues/8110#issuecomment-1595846841).
- Fix `poetry.toml` options they were wrong previously.
- Add dependencies of poetry files to templates `files-changed`.

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Co-authored-by: Giteabot <teabot@gitea.io>

So I found this [linter](https://github.com/Riverside-Healthcare/djlint)
which features a mode for go templates, so I gave it a try and it did
find a number of valid issue, like unbalanced tags etc. It also has a
number of bugs, I had to disable/workaround many issues.

Given that this linter is written in python, this does add a dependency
on `python` >= 3.8 and `poetry` to the development environment to be
able to run this linter locally.

- `e.g.` prefixes on placeholders are removed because the linter had a
false-positive on `placeholder="e.g. cn=Search"` for the `attr=value`
syntax and it's not ideal anyways to write `e.g.` into a placeholder
because a placeholder is meant to hold a sample value.
- In `templates/repo/settings/options.tmpl` I simplified the logic to
not conditionally create opening tags without closing tags because this
stuff confuses the linter (and possibly the reader as well).