Implement production vertical slice foundation

game/presentation/main_menu/main_menu_screen.gd

@@ -0,0 +1,24 @@
+class_name MainMenuScreen
+extends Control
+
+signal new_game_requested
+signal quit_requested
+
+@onready var _continue_button: Button = %ContinueButton
+@onready var _new_game_button: Button = %NewGameButton
+@onready var _quit_button: Button = %QuitButton
+
+
+func _ready() -> void:
+	_continue_button.disabled = true
+	_continue_button.tooltip_text = "Aucune sauvegarde disponible"
+	_new_game_button.pressed.connect(_on_new_game_pressed)
+	_quit_button.pressed.connect(_on_quit_pressed)
+
+
+func _on_new_game_pressed() -> void:
+	new_game_requested.emit()
+
+
+func _on_quit_pressed() -> void:
+	quit_requested.emit()