Upgrade to uv>=0.6.0 and enable-cache

[cclauss]

A superset of

• GitHub Actions: Use uv cache, not pip cache #2363

This uses uv cache, not pip cache but also upgrades uv to v0.6.0 which contains several breaking changes...

• https://github.com/astral-sh/uv/releases --> uv version: >= 0.6.0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.16%. Comparing base (a255775) to head (37949c2).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2364   +/-   ##
=======================================
  Coverage   99.16%   99.16%           
=======================================
  Files          40       40           
  Lines        3098     3098           
  Branches      680      680           
=======================================
  Hits         3072     3072           
  Misses         15       15           
  Partials       11       11           

[DanielNoord]

@staticdev Are you okay with me merging this one? It is not related to core functionality of isort but just general project maintenance.

[staticdev]

Lgtm.

[staticdev]

Thanks @cclauss @DanielNoord