languages/python: add ruff as lsp

[QuiNzX]

In this PR I've added ruff as lsp.

Breaking change:
What has changed is that before cfg.lsp.server expected a single value but now it expects a list.
So that ruff can work in conjuction with basedpyright(or any other lsp) which is recommended according to the ruff docs.

I might going to add more granular options for the lsp if you like unless you have something else in mind that will do so. ruff lsp
This is my first nix pr so let me know if I made any mistakes!

EDIT: because of the toList function the breaking change isn't the case anymore for cfg.lsp.server .
Let me know if there is a better approach to it!
However the breaking change is still in the case of python.lsp.package which now requires each lsp server specified as an attribute set . On the bright side you can now set arguments for each lsp.
Like so:

package = {
  ruff = [lib.getExe pkgs.ruff "server"];
  basedpyright = [lib.getExe pkgs.basedpyright];
};

• I have updated the [changelog] as per my changes
• I have tested, and self-reviewed my code
• 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)
• Tested on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin

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Debug Information

Triggered by: QuiNzX

HEAD at: feat-ruff

Reruns: 138

[NotAShelf]

Requested changes to remain consistent with the rest of the codebase, and to conform to our code styles.

To be honest, I don't quite like how this is handled. Not to say I can think of anything better at the moment, but this is entirely different from other language modules and might cause confusion.

I'll probably merge this after the requested changes are implemented, but I think a cleanup is due in the language module.

[NotAShelf]

This reference is not used anywhere. You can remove it if you do not intend to refer to it as [ruff lsp] inline

[NotAShelf]

Please don't access lib inline

Suggested change

	type = lib.types.attrsOf (either package (listOf str));
	type = attrsOf (either package (listOf str));

where attrsOf is inherited from types in the top-level let in.

[QuiNzX]

Thanks for the feedback!
I've made the necessary changes. However I have yet to find a way to stay consistent with the rest of the codebase. I'm looking forward to the language module cleanup so that my diabolical change will be resolved.

[NotAShelf]

Move toList from an inherit at the top.