fix(framework): include shared desktop applications

- Import the desktop applications module on Framework
- Update module and README descriptions to cover all hosts

hosts/framework/configuration.nix

@@ -5,6 +5,7 @@
     ../../modules/common.nix
     ../../modules/kde.nix
     ../../modules/development.nix
+    ../../modules/desktop-apps.nix
     ../../modules/gaming.nix
   ];