hyprland: do not override existing plugins settings in config

The plugin setting in the Hyprland config is used both for defining
plugin paths and configuring the plugins. This fix removes the
silent override of the plugins settings converting them to the
`plugin:<name> { ...settings }` syntax.

modules/services/window-managers/hyprland.nix

@@ -207,7 +207,8 @@ in {
             else
               entry;
         in map mkEntry cfg.plugins;
-      };
+      } // lib.mapAttrs' (n: v: lib.nameValuePair "plugin:${n}" v)
+        (lib.attrByPath [ "plugin" ] { } cfg.settings);
 
       shouldGenerate = cfg.systemd.enable || cfg.extraConfig != ""
         || combinedSettings != { };

tests/modules/services/window-managers/hyprland/simple-config.conf

@@ -26,6 +26,13 @@ input {
   follow_mouse=1
   kb_layout=ro
 }
+
+plugin:plugin1 {
+  section {
+    other=dummy setting
+  }
+  dummy=plugin setting
+}
 bindm=$mod, mouse:272, movewindow
 bindm=$mod, mouse:273, resizewindow
 bindm=$mod ALT, mouse:272, resizewindow

tests/modules/services/window-managers/hyprland/simple-config.nix

@@ -45,6 +45,13 @@
         "$mod, mouse:273, resizewindow"
         "$mod ALT, mouse:272, resizewindow"
       ];
+
+      plugin = {
+        plugin1 = {
+          dummy = "plugin setting";
+          section = { other = "dummy setting"; };
+        };
+      };
     };
     extraConfig = ''
       # window resize