add basic match3 logic

use proper logging everywhere
add gamepad and keyboard control on match3 gameplay

scenes/main/PressAnyKeyScreen.gd

@@ -3,12 +3,12 @@ extends Control
 signal any_key_pressed
 
 func _ready():
-	print("PressAnyKeyScreen ready")
+	DebugManager.log_debug("PressAnyKeyScreen ready", "PressAnyKey")
 	update_text()
 
 func _input(event):
 	if event.is_action_pressed("any_key") or event is InputEventScreenTouch:
-		print("Any key pressed: ", event)
+		DebugManager.log_debug("Any key pressed: " + str(event), "PressAnyKey")
 		any_key_pressed.emit()
 		get_viewport().set_input_as_handled()