feat(UI): 添加编译提示面板并更新启动流程

在启动单机游戏时显示编译提示面板
扩展FullscreenPanelBase增加afterOpen和beforeClose钩子
添加CompilingTip面板相关资源和脚本

scripts/Contents/Panels/CompilingTip.gd

@@ -0,0 +1,5 @@
+@tool
+extends FullscreenPanelBase
+
+func afterOpen(_args: Array = []):
+	UIState.closeCurrentPanel()

scripts/Contents/Panels/CompilingTip.gd.uid

@@ -0,0 +1 @@
+uid://dubab2jnii6et

scripts/Contents/Panels/Starter.gd

@@ -65,7 +65,7 @@ func startSingleplayerGame():
 	MultiplayerState.playerName = playerNameInput.text
 	EntityBase.generatePlayer(playerNameInput.text)
 	WorldManager.rootNode.spawnWave(Vector2.ZERO)
-	UIState.closeCurrentPanel()
+	UIState.setPanel("CompilingTip")
 
 func _ready():
 	historyStack = Composables.useHistoryStack(playerNameInput)