Django-rosetta

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* Tests: update flake8 in tox tests
* Format all rendered assets (html, css, js) in a pre-commit task. (PR 294, thanks balazs-endresz)
* Fix Deepl translations containing variables (276, PR 290, thanks halitcelik)
* Rewrite rosetta.js: drop jQuery and modernize rosetta.js (PR 295, thanks balazs-endresz)
* Fix broken link in documentation (PR 300, thanks KommuSoft)
* Test against Django 5.2
* Add OPENAI_BASE_URL and OPENAI_MODEL config for self hosted LLM translation (PR 301, thanks ydf)

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* Remamed the zh_hans locale to zh_Hans (issue 282, thanks sunfkny)
* Fixed the test configuration following 282
* Improve CSP support by avoiding inline styles and server-side rendered stylesheets (287, thank you bmihelac)
* Improve error handling when using the Deepl translation service (288, thank you halitcelik)
* Add support for translation using OpenAI API (275, 291, thank you ydf, PR by vusallyv)
* Adds Azerbaijani translation (284 thanks vusallyv and nemoralis)
* Allow overriding OpenAI prompt with a template (PR 293, thanks danleyb2)
* Test against Django 5.1

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* Fix link to polib. (277, thanks gamboz)
* Deepl: use the PRO API endpoint when using a PRO API key. (278, thanks nullcode)
* Limit supported versions to Django 4.2 and 5.0, using Python 3.9, 3.10, 3.11 and 3.12

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* Use packaged jQuery instead of the CDN version. (274, thanks stephanema1)
* Test test_47_azure_ajax_translation: avoid DNS lookup for better isolation. Should fix 233
* Adds Chinese (Simplified) translation. (266 thanks chenluyong)
* Test against Django 4.1 and 4.2
* Limit supported versions to Django 3.2 and later, using Python 3.8, 3.9 and 3.10
* Proxy Deepl translations suggestions through the back-end to avoid CORS issues. (271 thanks rafaelromon, biermeester and matthiask)
* Format code with pre-commit
* Replace case sensitivity check with setting (273 thanks patroqueeet)

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* Test against Django 4.0

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* Arabic translation. (257, thanks Bashar)
* Translations via the DeepL API (258, thanks halitcelik)
* Fixed unicode handling in gettext headers (259, thanks NotSqrt)
* Remove six as a dependency
* Move context and comment hints into the right-most column (260 thanks jieter)
* Add extra styles block to the base template (261 thanks Frohus and adamjforster)