init

- 框架初始化
 - 安装插件
 - 修复PHP8.4报错

application/admin/command/Crud/stubs/mixins/datetime.stub

@@ -0,0 +1,6 @@
+
+    public function {%methodName%}($value, $data)
+    {
+        $value = $value ?: ($data['{%field%}'] ?? '');
+        return is_numeric($value) ? date("Y-m-d H:i:s", $value) : $value;
+    }