WIP: added pdo proxy

[PandaLIU-1111]

使用 pdo proxy 需要在 hyperf 项目内 /config/autoload/annotations.php 增加以下内容

return [
    'scan' => [
        'class_map' => [
            Connector::class => BASE_PATH . '/vendor/seata/seata/src/Rm/DataSource/ClassMap/Connector.php',
        ],
    ],
];

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