theme/habamax: add neovim builtin theme habamax

[snoweuph]

Adding the neovim builtin theme habamax to the allowed themes with nvf.

Sanity Checking

[changelog]: https://github.com/NotAShelf/nvf/tree/main/docs/release-notes <-- deadlink (https://github.com/NotAShelf/nvf/blob/main/docs/manual/release-notes.md)
[hacking nvf]: https://notashelf.github.io/nvf/index.xhtml#sec-guidelines <-- deadlink (https://nvf.notashelf.dev/hacking.html)

• I have updated the [changelog] as per my changes <-- should I create a new file for the 0.9 release, because 0.8 is already released?
• I have tested, and self-reviewed my code
• My changes fit guidelines found in [hacking nvf]
• Style and consistency
  • I ran Alejandra to format my code (nix fmt)
  • My code conforms to the editorconfig configuration of the project
  • 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:
  • .#nix (default package)
  • .#maximal
  • .#docs-html (manual, must build)
  • .#docs-linkcheck (optional, please build if adding links)
• Tested on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin

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[github-actions]

🚀 Live preview deployed from e0f6fe7

View it here:

Debug Information

Triggered by: snoweuph

HEAD at: feature/habamax

Reruns: 1779

[snoweuph]

Collapsing MR. merge (#1288) first