Refactor Godot architecture into AppShell, modular menus and game domains

menus/assets/shaders/ambient_drift.gdshader

@@ -0,0 +1,11 @@
+shader_type canvas_item;
+
+uniform float drift_strength : hint_range(0.0, 4.0) = 1.2;
+uniform float drift_speed : hint_range(0.0, 2.0) = 0.22;
+uniform float wave_scale : hint_range(0.001, 0.05) = 0.012;
+
+void vertex() {
+	float wave = sin(TIME * drift_speed + VERTEX.y * wave_scale) * drift_strength;
+	VERTEX.x += wave * (UV.y * 0.7 + 0.3);
+	VERTEX.y += sin(TIME * drift_speed * 0.73 + VERTEX.x * wave_scale) * drift_strength * 0.18;
+}

menus/assets/shaders/ambient_drift.gdshader.uid

@@ -0,0 +1 @@
+uid://i1m60q862ykj