services: move .nix files into their own dirs

modules/services/greetd.nix

@@ -1,48 +0,0 @@
-{
-  config,
-  lib,
-  pkgs,
-  ...
-}: let
-  cfg = config.modules.services.greetd;
-  uwsmEnabled = config.modules.services.uwsm.enable;
-  inherit (lib.options) mkOption mkEnableOption;
-  inherit (lib.types) str listOf;
-  inherit (lib.modules) mkIf;
-in {
-  options.modules.services.greetd = {
-    enable = mkEnableOption "greetd";
-    greeter = mkOption {
-      description = "greetd frontend to use";
-      type = str;
-    };
-    launchOptions = mkOption {
-      description = "/etc/greetd/environments as list of strings";
-      type = listOf str;
-    };
-    session = mkOption {
-      description = "Which login session to start";
-      type = str;
-      default =
-        if uwsmEnabled
-        then "uwsm start Hyprland"
-        else "Hyprland";
-    };
-  };
-
-  config = mkIf cfg.enable {
-    services.greetd = {
-      enable = true;
-      package = pkgs.greetd;
-      settings.default_session = {
-        command = ''
-          ${pkgs.greetd.tuigreet}/bin/tuigreet \
-            -c \"${cfg.session}\" \
-            -r 
-            -t --time-format "DD.MM.YYYY"
-            --asteriks'';
-      };
-      vt = 7;
-    };
-  };
-}