feat: upgrade to NixOS 25.11

- Update nixpkgs and home-manager to 25.11 release
- Update flake dependencies
- Migrate git config to settings attribute
- Replace deprecated packages (mpc-cli -> mpc, vaapiIntel -> intel-vaapi-driver)
- Fix system references to use stdenv.hostPlatform.system
- Add crowdsec module overrides
- Remove android-udev-rules from fuchsia
- Configure SSH with enableDefaultConfig = false
- Update zsh dotDir to use config.xdg.configHome

nixos/common/users/sajenim/xmonad/default.nix

@@ -15,7 +15,7 @@
       # Picture viewer
       pkgs.xfce.ristretto
       # Install our XMonad and Xmobar configuration
-      inputs.xmonad-config.packages.${pkgs.system}.default
+      inputs.xmonad-config.packages.${pkgs.stdenv.hostPlatform.system}.default
     ];
   };