feat: 完成对游戏当前内容的翻译

scenes/main_menu.tscn

@@ -77,7 +77,7 @@ offset_right = 330.81818
 offset_bottom = 224.0
 theme_override_fonts/font = ExtResource("1_l6cm7")
 theme_override_font_sizes/font_size = 36
-text = "创建房间"
+text = "MAINMENU_CREATEROOM"
 
 [node name="Label" type="Label" parent="CreateGameUI" unique_id=1494594728]
 offset_left = 131.0
@@ -85,7 +85,7 @@ offset_top = 88.0
 offset_right = 326.0
 offset_bottom = 126.0
 theme_override_fonts/font = ExtResource("1_l6cm7")
-text = "请输入最大玩家数（2～4）"
+text = "MAINMENU_INPUTPLAYERNUM"
 
 [node name="Warn" type="Node2D" parent="CreateGameUI" unique_id=961920457]
 visible = false
@@ -102,7 +102,7 @@ offset_left = 167.0
 offset_top = 125.0
 offset_right = 279.0
 offset_bottom = 188.0
-text = "确定"
+text = "UI_CONFIRM"
 
 [node name="WarnLabel" type="Label" parent="CreateGameUI/Warn" unique_id=320937650]
 offset_left = 126.0
@@ -110,8 +110,7 @@ offset_top = 64.0
 offset_right = 316.0
 offset_bottom = 107.0
 theme_override_fonts/font = ExtResource("1_l6cm7")
-text = "输入数据错误！
-请输入2～4之间的整数！"
+text = "MAINMENU_PLAYERNUMERROR"
 horizontal_alignment = 1
 
 [node name="JoinGameUI" type="Node2D" parent="." unique_id=1134060090]
@@ -138,7 +137,7 @@ offset_right = 330.81818
 offset_bottom = 224.0
 theme_override_fonts/font = ExtResource("1_l6cm7")
 theme_override_font_sizes/font_size = 36
-text = "加入房间"
+text = "MAINMENU_JOINROOM"
 
 [node name="Label" type="Label" parent="JoinGameUI" unique_id=1927653368]
 offset_left = 131.0
@@ -146,7 +145,7 @@ offset_top = 88.0
 offset_right = 326.0
 offset_bottom = 126.0
 theme_override_fonts/font = ExtResource("1_l6cm7")
-text = "请输入服务器IP（无需加端口）"
+text = "MAINMENU_INPUTSERVERIP"
 
 [node name="SettingButton" type="Button" parent="." unique_id=1367541903]
 offset_left = 1998.0