feat(website): full rewrite

[drainpixie]

Relevant issues

Brief

• Online editor via pyodide (currently blocked by the necessity of a new release and [rfc] stabilised wire output for proselint #1427)
• REST API to interact with proselint feat(app): add simple rest api #1463
• Auto-generated, searchable, static documentation (currently blocked by [rfc] draft guidelines for existing and new checks #1408)
• Help section / general how-to
• Get rid of Tailwind
• Use Vite
• Syntax highlighting Explore whether syntax highlighting would make sense (would remove the need to manually highlight but increase bundle size, + theming concerns)

Changes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.62%. Comparing base (505e07c) to head (7cb3783).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1437      +/-   ##
==========================================
+ Coverage   92.56%   92.62%   +0.06%     
==========================================
  Files         100      100              
  Lines        1022     1017       -5     
==========================================
- Hits          946      942       -4     
+ Misses         76       75       -1     

Flag	Coverage Δ
macos-latest	92.03% <ø> (+0.05%)	⬆️
py3.10	92.62% <ø> (+0.06%)	⬆️
py3.11	92.62% <ø> (+0.06%)	⬆️
py3.12	92.62% <ø> (+0.06%)	⬆️
py3.13	92.03% <ø> (+0.05%)	⬆️
py3.14	92.03% <ø> (+0.05%)	⬆️
ubuntu-latest	92.03% <ø> (+0.05%)	⬆️
windows-latest	92.62% <ø> (+0.06%)	⬆️

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