Add Home Manager module

[benvonh]

Added module.nix to the nix folder.

README is updated to show how to use it.

A few design problems are:

1. There is no clean way to reload the config. You have to stop HyprPanel and restart it.
2. Waiting for feat: allow reading of JSON objects in the configuration #497 to be merged so that the config generation logic can be drastically simplified.
3. Overwriting config.json through the GUI is a problem due to how Nix works. The best workaround is to generate a file highlighting the differences instead of overwriting it so that users can easily update their config in the Nix module. This has to be done manually by nature but would also be very nice to have (low priority).

[orangci]

this is wonderful! one thing; fitting all this documentation in the readme would be a lot. i suggest instead putting it instead in the docs

edit: and while you're waiting for #497, you can just mark this as a draft PR

[benvonh]

@orangci I replaced it with a link to the installation page.

Also, the module was made to handle without that PR but I'll set this as a draft anyway.

If anyone wants to try using it now, just change the flake input URL to my fork.

[orangci]

Also, the module was made to handle without that PR but I'll set this as a draft anyway.

ah i see now, your wording in the original PR message didn't make this clear

is this ready, or do you need to do more work on it?

resolved

[benvonh]

Yes, it's ready - I wouldn't submit a PR if it wasn't xd

It's just that those design problems make the inside logic messy. But functionality-wise, it's all working. I'll slowly fix them at a later date.

[orangci]

ill merge this then. thanks for the contribution 💖💖💖
edit: ah i need you to update your fork because i cant merge it otherwise

[benvonh]

Done 👍