create shared niri config, refactor generic feature modules

modules/components/shells/noctalia.nix

@@ -16,8 +16,6 @@
   flake.homeModules.graphics = { pkgs, config, lib, inputs, ... }: {
     config = lib.mkIf ((config.components.shells == "noctalia")||(builtins.elem "noctalia" config.components.shells)) {
       home = {
-        packages = lib.mkIf (config.info.isStandalone) [ inputs.noctalia.packages.${pkgs.stdenv.hostPlatform.system}.default ];
-
         activation = {
           linkNoctaliaState = lib.hm.dag.entryAfter ["writeBoundary"] (inputs.helpers.mkSymlinkActivationScript { 
             target = "${config.home.homeDirectory}/.local/state/noctalia/settings.toml";