docs: add install instructions for Nix, Homebrew, and Docker

[schembriaiden]

Pull Request Description

Added install instruction for:

• Nix
• Homebrew
• Docker Rootless

Issue Being Fixed

N/A

Resolves #issue-number

Screenshots / Recordings

Checklist

• If a new package was added, did you ensure it works for all supported platforms? Is the package well maintained
• Check that any changes are related to the issue at hand.

[PartyDonut]

Hi thanks for updating the documentation.

Just saw your comment on the license agreement for winget.

The reason I disabled it for now is I'm not sure whether the license itself is something I agree with. Looks to me like Microsoft is granted pretty much a do whatever they want with the source code license. So I'm not quite sure if I would still like to support winget.

[schembriaiden]

The reason I disabled it for now is I'm not sure whether the license itself is something I agree with. Looks to me like Microsoft is granted pretty much a do whatever they want with the source code license. So I'm not quite sure if I would still like to support winget.

Yep I totally agree with it. Honestly I don't really like the way winget does things especially security wise as I think it is the most unsecure package manager I have seen yet. I have removed tthe winget installation part and I added the Nix part, so if everythiing is fine this should be merged after #630

[PartyDonut]

Same as #630