languages/fish: init

[poseidon-rises]

Add fish support with fish-lsp and fish_indent.

Rewrite of #807 using the new API as the original creator has stopped responding.

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)
  • [ ] .#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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[github-actions[bot]]

:rocket: Live preview deployed from 8ff302fadd19d1dce46ae163bc38e0c9453a7e24

View it here:

Debug Information

Triggered by: poseidon-rises

HEAD at: languages/fish

Reruns: 1437

[horriblename]

I'll hold off on merging this till #1103 is merged