fix: 修复聊天系统编译错误

- 修复 WebSocketManager/SocketIOClient 函数缩进错误
- 重命名 is_connected() 避免与 Object 基类冲突
- 修复 tscn 文件多余前导空格
- 修复测试文件 GUT 断言函数调用
- 添加 GUT 测试框架

addons/gut/autofree.gd

@@ -0,0 +1,86 @@
+# ##############################################################################
+#(G)odot (U)nit (T)est class
+#
+# ##############################################################################
+# The MIT License (MIT)
+# =====================
+#
+# Copyright (c) 2025 Tom "Butch" Wesley
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+# ##############################################################################
+# Class used to keep track of objects to be freed and utilities to free them.
+# ##############################################################################
+var _to_free = []
+var _to_queue_free = []
+var _ref_counted_doubles = []
+var _all_instance_ids = []
+
+
+func _add_instance_id(thing):
+	if(thing.has_method("get_instance_id")):
+		_all_instance_ids.append(thing.get_instance_id())
+
+
+func add_free(thing):
+	if(typeof(thing) == TYPE_OBJECT):
+		_add_instance_id(thing)
+		if(!thing is RefCounted):
+			_to_free.append(thing)
+		elif(GutUtils.is_double(thing)):
+			_ref_counted_doubles.append(thing)
+
+
+func add_queue_free(thing):
+	if(typeof(thing) == TYPE_OBJECT):
+		_add_instance_id(thing)
+		_to_queue_free.append(thing)
+
+
+func get_queue_free_count():
+	return _to_queue_free.size()
+
+
+func get_free_count():
+	return _to_free.size()
+
+
+func free_all():
+	for node in _to_free:
+		if(is_instance_valid(node)):
+			if(GutUtils.is_double(node)):
+				node.__gutdbl_done()
+			node.free()
+	_to_free.clear()
+
+	for i in range(_to_queue_free.size()):
+		if(is_instance_valid(_to_queue_free[i])):
+			_to_queue_free[i].queue_free()
+	_to_queue_free.clear()
+
+	for ref_dbl in _ref_counted_doubles:
+		ref_dbl.__gutdbl_done()
+	_ref_counted_doubles.clear()
+
+	_all_instance_ids.clear()
+
+
+func has_instance_id(id):
+	return _all_instance_ids.has(id)