python/uv: init

[rrvsh]

This PR adds uv.nvim, which adds the UV package manager functionality, primarily being able to activate virtual environments inside neovim for use with LSPs.

i added it as languages.python.uv.* but it could easily fit under vim.utility as well - let me know if I should make this change

Sanity Checking

• [x] I have updated the changelog as per my changes
• [x] I have tested, and self-reviewed my code
• [x] My changes fit guidelines found in hacking nvf
• Style and consistency
  • [x] I ran Alejandra to format my code (nix fmt)
  • [x] My code conforms to the editorconfig configuration of the project
  • [x] My changes are consistent with the rest of the codebase
• If new changes are particularly complex:
  • [ ] My code includes comments in particularly complex areas
  • [ ] I have added a section in the manual
  • [ ] (For breaking changes) I have included a migration guide
• Package(s) built:
  • [x] .#nix (default package)
  • [x] .#maximal
  • [x] .#docs-html (manual, must build)
  • [x] .#docs-linkcheck (optional, please build if adding links)
• Tested on platform(s)
  • [x] x86_64-linux
  • [ ] aarch64-linux
  • [ ] x86_64-darwin
  • [ ] aarch64-darwin

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:rocket: Live preview deployed from 5bad5dd94ce5ea3b40b08d9e6802e69d02198d21

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Debug Information

Triggered by: rrvsh

HEAD at: uv-nvim

Reruns: 1008

[rrvsh]

sorry clicked the evil github update branch button give me a second to force push to rebase onto main