Adds:
- `serve-docs` to the default devShell
- `packages.serve-docs`
- `apps.docs`
Having `apps.docs` defined causes `nix run .#docs` to run the "app"
instead of `packages.docs`. `nix build .#docs` will still build the
"package", not the "app".
The `serve-docs` script added to the devShell runs `nix run .#docs`
instead of having `packages.serve-docs` in its closure. This avoids the
devShell actually building the docs.
Added a note to `doc/src/modules.md`.
Link: https://github.com/nix-community/stylix/pull/1328
Reviewed-by: awwpotato <awwpotato@voidq.com>
Co-authored-by: NAHO <90870942+trueNAHO@users.noreply.github.com>
Reviewed-by: NAHO <90870942+trueNAHO@users.noreply.github.com>
