fix(framework): include shared desktop applications

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

README.md

@@ -20,8 +20,7 @@ Each `hosts/<host>/configuration.nix` explicitly imports its own generated
 - `kde.nix`: Plasma 6, SDDM, US keyboard, PipeWire, Bluetooth, printing, Flatpak.
 - `development.nix`: Emacs, VS Code, htop, general CLI/DevOps tools, Docker,
   direnv and nix-direnv on every host.
-- `desktop-apps.nix`: selected shared desktop applications, imported by the two
-  ThinkPads only.
+- `desktop-apps.nix`: selected shared desktop applications on every host.
 - `gaming.nix`: shared Steam setup on all three hosts. The ThinkPads' different
   games, Wine variants and X1EG2 GameMode customization stay at host level.