Add setup-tailwind-standalone Make target

[Simrayz]

Scope and purpose

Add make setup-tailwind-standalone. It is a Django-free alternative to make setup-tailwind for use when building releases.

It chains the existing targets upgrade-tailwind, tailwind-build-config, and tailwind, which all work without Django.

Contributor Checklist

• 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
• 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

[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

[github-actions]

Test results

    6 files  1 248 suites   2m 28s ⏱️
  909 tests   908 ✅ 1 💤 0 ❌
5 454 runs  5 448 ✅ 6 💤 0 ❌

Results for commit 96bbe3a.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.47%. Comparing base (1bfd2c9) to head (96bbe3a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1912   +/-   ##
=======================================
  Coverage   88.47%   88.47%           
=======================================
  Files         144      144           
  Lines        6975     6975           
=======================================
  Hits         6171     6171           
  Misses        804      804           

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