docs: update nixos documentation

[soopyc]

See commit messages for changes.

As usual, a preview is available on https://t2wiki.soopy.moe/

Blocked by #540

[AdityaGarg8]

You also can update the wifi guide to checkout the nixos guide as well.

[soopyc]

You also can update the wifi guide to checkout the nixos guide as well.

I personally don't feel the need as the mere existence of a dedicated firmware section should indicate that it's important, but a pointer can still be added; I'm not exactly sure where to put this though - no other distros has instructions as specific as NixOS.

[AdityaGarg8]

You also can update the wifi guide to checkout the nixos guide as well.

I personally don't feel the need as the mere existence of a dedicated firmware section should indicate that it's important, but a pointer can still be added; I'm not exactly sure where to put this though - no other distros has instructions as specific as NixOS.

You can add a warning like arch and endeavour os have over there.

[AdityaGarg8]

LGTM