Django-comments-xtd

* Removes external dependencies from `django_comments_xtd/__init__.py`.
* Opens up the range of supported Django versions to "Django>=4,<6".
* Uses `pyproject.toml` to replace `setup.py`.
* Updates `tox.ini`.
* Build JavaScript plugin during CI.
* Replace flake8 with ruff, and adopt pre-commit rules.
* Many stylistic changes after applying ruff.

* Updates the version number of the JavaScript plugin to the version of the Python package.

* Fixes [issue 451](https://github.com/danirus/django-comments-xtd/issues/451): Exceeding the `COMMENT_MAX_LENGTH` does not reflect in the UI, either when using django templates or when using the JavaScript plugin.

* Add reminder about template loading order to the documentation.
* Fix template name `comment_tree.html` in doc strings and the documentation.
* Fix variable template name in `form.html`, in custom example site.
* Remove duplicated code.

* Updated French translation.
* Updated battery of tests to check compatibility with Django 5.1.
* GHA: Remove secret from PyPI, as it is now a trusted repository.
* Add support for light/dark color scheme in tutorial.
* Updated example projects: add support for light/dark color schemes.
* Updated dependencies in package.json.
* Updated templates `comments/posted.html`, `comments/preview.html`, and `django_comments_xtd/moderated.html`.
* Docs: Use Bootstrap icon `chat-text-fill.svg` as project's icon.
* Docs: Updated Tutorial. Fixes script example.
* Docs: Use sphinx-nefertiti v0.5 and sphinx-colorschemed-images.

* Add ordering filter to the CommentList API class.
* Include django-rest-framework v3.15 in tests and example sites.
* Update tutorial in the documentation.
* Following templates have changed:
- `comments/flag.html`
- `comments/form.html`
- `django_comments_xtd/comment_tree.html`
- `django_comments_xtd/dislike.html`
- `django_comments_xtd/like.html`
- `django_comments_xtd/reply.html`