refactor(app): compose settings and developer tools

src/AcDream.App/Input/PlayerModeController.cs

@@ -17,7 +17,9 @@ namespace AcDream.App.Input;
 /// chase-camera lifetimes. The window host wires this owner but never mutates
 /// those slots directly.
 /// </summary>
-internal sealed class PlayerModeController : ILocalPlayerTeleportModeOperations
+internal sealed class PlayerModeController :
+    ILocalPlayerTeleportModeOperations,
+    IDevToolsPlayerModeTarget
 {
     private readonly LocalPlayerModeState _mode;
     private readonly LocalPlayerControllerSlot _controllerSlot;