bug: services.fusuma.settings writes config w/ wrong filename

[pluiedev]

Are you following the right branch?

• [X] My Nixpkgs and Home Manager versions are in sync

Is there an existing issue for this?

• [X] I have searched the existing issues

Issue description

Fusuma looks for configuration files at ~/.config/fusuma/config.yml, not config.yaml. While the module currently works, it sidesteps this issue by manually specifying the path to the config, which is certainly not ideal for people like me trying to debug issues with fusuma by launching it directly.

Maintainer CC

@iosmanthus

System information

- system: `"x86_64-linux"`
 - host os: `Linux 6.1.74, NixOS, 24.05 (Uakari), 24.05.20240121.612f972`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.18.1`
 - nixpkgs: `/nix/store/rqdf3gfjq8zh488msnv62h03kkzr308q-source`

[teto]

agreed we should stick to defaults (I didn't with the notmuch module and regretted it)

[zorrobert]

I've opened a PR that solves this issue (see #5049) @iosmanthus @berbiche @sumnerevans