Docs updates

[swrichards]

Summary

Various documentation updates and improvements by @Djuzz-LdL.

Checklist

• CHANGELOG.rst updated

---

📚 Documentation preview 📚: https://open-inwoner--1916.org.readthedocs.build/en/1916/

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.00%. Comparing base (4d98fb9) to head (5ab9e61).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1916   +/-   ##
========================================
  Coverage    94.00%   94.00%           
========================================
  Files         1153     1153           
  Lines        44339    44339           
========================================
  Hits         41680    41680           
  Misses        2659     2659           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.