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/gui/about.gd

@@ -0,0 +1,125 @@
+@tool
+extends AcceptDialog
+
+var GutEditorGlobals = load('res://addons/gut/gui/editor_globals.gd')
+
+var _bbcode = \
+"""
+[center]GUT {gut_version}[/center]
+
+[center][b]GUT Links[/b]
+{gut_link_table}[/center]
+
+[center][b]VSCode Extension Links[/b]
+{vscode_link_table}[/center]
+
+[center]You can support GUT development at
+{donate_link}
+
+Thanks for using GUT!
+[/center]
+"""
+
+var _gut_links = [
+	[&"Documentation", &"https://gut.readthedocs.io"],
+	[&"What's New", &"https://github.com/bitwes/Gut/releases/tag/v{gut_version}"],
+	[&"Repo", &"https://github.com/bitwes/gut"],
+	[&"Report Bugs", &"https://github.com/bitwes/gut/issues"]
+]
+
+var _vscode_links = [
+	["Repo", "https://github.com/bitwes/gut-extension"],
+	["Market Place", "https://marketplace.visualstudio.com/items?itemName=bitwes.gut-extension"]
+]
+
+var _donate_link = "https://buymeacoffee.com/bitwes"
+
+@onready var _logo = $Logo
+
+
+func _ready():
+	if(get_parent() is SubViewport):
+		return
+
+	_vert_center_logo()
+	$Logo.disabled = true
+	$HBox/Scroll/RichTextLabel.text = _make_text()
+
+
+func _color_link(link_text):
+	return str("[color=ROYAL_BLUE]", link_text, "[/color]")
+
+
+func _link_table(entries):
+	var text = ''
+	for entry in entries:
+		text += str("[cell][right]", entry[0], "[/right][/cell]")
+		var link = str("[url]", entry[1], "[/url]")
+		if(entry[1].length() > 60):
+			link = str("[url=", entry[1], "]", entry[1].substr(0, 50), "...[/url]")
+
+		text += str("[cell][left]", _color_link(link), "[/left][/cell]\n")
+	return str('[table=2]', text, '[/table]')
+
+
+func _make_text():
+	var gut_link_table = _link_table(_gut_links)
+	var vscode_link_table = _link_table(_vscode_links)
+
+	var text = _bbcode.format({
+		"gut_link_table":gut_link_table,
+		"vscode_link_table":vscode_link_table,
+		"donate_link":_color_link(str('[url]', _donate_link, '[/url]')),
+		"gut_version":GutUtils.version_numbers.gut_version,
+	})
+	return text
+
+
+func _vert_center_logo():
+	_logo.position.y = size.y / 2.0
+
+
+# -----------
+# Events
+# -----------
+func _on_rich_text_label_meta_clicked(meta: Variant) -> void:
+	OS.shell_open(str(meta))
+
+
+func _on_mouse_entered() -> void:
+	pass#_logo.active = true
+
+
+func _on_mouse_exited() -> void:
+	pass#_logo.active = false
+
+
+var _odd_ball_eyes_l = 1.1
+var _odd_ball_eyes_r = .7
+func _on_rich_text_label_meta_hover_started(meta: Variant) -> void:
+	if(meta == _gut_links[0][1]):
+		_logo.set_eye_color(Color.RED)
+	elif(meta.find("releases/tag/") > 0):
+		_logo.set_eye_color(Color.GREEN)
+	elif(meta == _gut_links[2][1]):
+		_logo.set_eye_color(Color.PURPLE)
+	elif(meta == _gut_links[3][1]):
+		_logo.set_eye_scale(1.2)
+	elif(meta == _vscode_links[0][1]):
+		_logo.set_eye_scale(.5, .5)
+	elif(meta == _vscode_links[1][1]):
+		_logo.set_eye_scale(_odd_ball_eyes_l, _odd_ball_eyes_r)
+		var temp = _odd_ball_eyes_l
+		_odd_ball_eyes_l = _odd_ball_eyes_r
+		_odd_ball_eyes_r = temp
+	elif(meta == _donate_link):
+		_logo.active = false
+
+
+func _on_rich_text_label_meta_hover_ended(meta: Variant) -> void:
+	if(meta == _donate_link):
+		_logo.active = true
+
+
+func _on_logo_pressed() -> void:
+	_logo.disabled = !_logo.disabled