feat(poc): implement Sprint 1 proof of concept

- project.godot with autoload configuration
- Reception room with placeholder visuals
- Draggable Character with DragDropComponent
- Interactive flower object with bounce animation
- GameState, SaveManager, AudioManager, InputManager autoloads
- HUD with back button and music toggle

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

project.godot

@@ -0,0 +1,37 @@
+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; but this is the source of truth for engine configuration.
+
+config_version=5
+
+[application]
+
+config/name="Cozypaw Hospital"
+config/description="Werbefrei. Offline. Für Kinder."
+config/version="0.1.0"
+run/main_scene="res://scenes/main/Main.tscn"
+config/features=PackedStringArray("4.3", "Mobile")
+boot_splash/show_image=false
+
+[autoload]
+
+GameState="*res://scripts/autoload/GameState.gd"
+SaveManager="*res://scripts/autoload/SaveManager.gd"
+AudioManager="*res://scripts/autoload/AudioManager.gd"
+InputManager="*res://scripts/autoload/InputManager.gd"
+
+[display]
+
+window/size/viewport_width=1280
+window/size/viewport_height=720
+window/stretch/mode="canvas_items"
+window/stretch/aspect="expand"
+
+[input_devices]
+
+pointing/emulate_touch_from_mouse=true
+
+[rendering]
+
+renderer/rendering_method="gl_compatibility"
+renderer/rendering_method.mobile="gl_compatibility"