Add tailwind-watch rule and use local cli explicitly

[Simrayz]

Scope and purpose

This PR adds a new tailwind-watch rule to the Makefile. It runs the tailwind CLI in watch mode, so the css is automatically updated when changing usage of classes in html file.

I also changed the tailwind rule to explicitly use the tailwind binary in the tailwind directory, instead of the "default" binary. Since I was using tailwindcss as a global CLI, it conflicted with the current implementation.

Contributor Checklist

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• Added a changelog fragment for towncrier
• Added/amended tests for new/changed code
• Added/changed documentation, including updates to the user manual if feature flow or UI is considerably changed
• Linted/formatted the code with ruff and djLint, easiest by using pre-commit
• [x The first line of the commit message continues the sentence "If applied, this commit will ...", starts with a capital letter, does not end with punctuation and is 50 characters or less long. See our how-to
• If applicable: Created new issues if this PR does not fix the issue completely/there is further work to be done
• If this results in changes in the UI: Added screenshots of the before and after
• If this results in changes to the database model: Updated the ER diagram

[github-actions]

Test results

    4 files    468 suites   17m 29s ⏱️
  565 tests   564 ✅ 1 💤 0 ❌
2 260 runs  2 256 ✅ 4 💤 0 ❌

Results for commit d5a2e70.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.45%. Comparing base (3bd147b) to head (f0590cf).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1560   +/-   ##
=======================================
  Coverage   78.45%   78.45%           
=======================================
  Files         124      124           
  Lines        5458     5458           
=======================================
  Hits         4282     4282           
  Misses       1176     1176           

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[hmpf]

You need to add the new rule to .PHONY

[Simrayz]

Thanks 🐴

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[hmpf]

The rule change is also done in the tailwind upgrade branch! It is probably not the only thing that happens in that branch that ought to be split out =)