split InitException to SingletonViolationException

src/ZM/Exception/SingletonViolationException.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ZM\Exception;
+
+class SingletonViolationException extends ZMException
+{
+    public function __construct(string $singleton_class_name)
+    {
+        parent::__construct(
+            "类 {$singleton_class_name} 是单例模式，不允许初始化多个实例。",
+            "请检查代码，确保只初始化了一个 {$singleton_class_name} 实例。",
+            69
+        );
+    }
+}