feat: 为角色添加显示名称并完善面板功能

为熊、公鸡、母鸡等角色添加displayName属性
修改FullscreenPanelBase及相关面板以支持参数传递
完善GameOver面板显示凶手信息功能
调整部分角色的节点索引和状态栏位置

scripts/Contents/Panels/GameOver.gd

@@ -4,5 +4,7 @@ extends FullscreenPanelBase
 @onready var audio = $"%audio"
 @onready var deadreason = $"%deadreason"
 
-func beforeOpen():
+func beforeOpen(args: Array = []):
 	audio.play()
+	var reasonTemplate = MathTool.randc_from(GameRule.deadReasons)
+	deadreason.text = (reasonTemplate + "凶手是%s。") % args