Fix tooltip_node wrong references (#332)

* Created a signal room_ready in ESCMain to notify ESCTooltip that it is ready.
Fixes #302

* docs: Automatic update of API docs

Co-authored-by: StraToN <StraToN@users.noreply.github.com>

addons/escoria-core/game/main.gd

@@ -3,6 +3,10 @@ extends Node
 
 # This script is basically the scene-switcher.
 
+
+signal room_ready
+
+
 # Global id of the last scene the player was before current scene
 var last_scene_global_id: String
 
@@ -46,6 +50,8 @@ func set_scene(p_scene: Node) -> void:
 	check_game_scene_methods()
 
 	set_camera_limits()
+	
+	emit_signal("room_ready")
 
 
 # Cleanup the current scene