Feat/add title suffix control

[WAGFS]

新增页面标题后缀全局控制

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[ruibaby]

感谢参与贡献，但这个改动我认为没有意义，从 SEO 的层面上讲也通常建议加上网站名：https://developers.google.com/search/docs/appearance/title-link?hl=zh-cn#:~:text=%E5%AD%97%E8%AF%8D%E2%80%9C%E8%A7%86%E9%A2%91%E2%80%9D%E2%80%9C%E6%AD%8C%E8%AF%8D%E2%80%9D%E3%80%82-,%E7%AE%80%E6%98%8E%E6%89%BC%E8%A6%81%E5%9C%B0%E5%9C%A8%E6%A0%87%E9%A2%98%E4%B8%AD%E5%AE%A3%E4%BC%A0%E5%93%81%E7%89%8C%E3%80%82,-%E7%BD%91%E7%AB%99%E9%A6%96%E9%A1%B5%E7%9A%84