Add Screen

Add a level screen

Read src/Game/Level/README.md; model it on ExampleLevel.cs (screen with UI) or QuitLevel.cs (logical, no UI).

Ask for the level name if not given. Then:

1. Add the enum value in Enum/Level.cs (e.g. Menu).

2. Create the screen class in src/Game/Level/<Name>Level.cs:

   • namespace Game.Game.Level;
   • a Control (or other Node) implementing ILevelObserver;
   • constructor takes IGameLevel and, if it has UI, the owning module's factory;
   • set ProcessMode = ProcessModeEnum.Always if it must react while the tree is paused;
   • build UI in _Ready (or host a module UI via its factory);
   • implement OnLevelOppened(newLevel, oldLevel) — typically Visible = newLevel == Enum.Level.<Name>.

3. Register it in GameLevel._Ready: create it, _observers.Add(...), AddChild(...) (usually under the CanvasLayer).

4. Switch to it from anywhere with _gameLevel.OpenLevel(Enum.Level.<Name>).

5. Verify with the verify skill.

A screen only decides when to show. Feature data/logic/layout belong in a module (add-module), not in the screen.