希望添加 leancloud 为后端的统计pv，并展示

[liziwl]

Make sure you go through the Hexo docs, Icarus user manual, and GitHub issues to see if the feature you are requesting has been already addressed by others.

Is your feature request related to a problem? Please describe.

由于目前 busuanzi 不能初始化，而且感觉有时候有稳定性问题，希望添加基于 leancloud 为后端的统计pv。

Describe the solution you'd like

leancloud 为后端的统计pv

Describe alternatives you've considered

无

Additional context

其他模版的方案：

• https://hexo.fluid-dev.com/docs/guide/#%E5%B1%95%E7%A4%BA-pv-%E4%B8%8E-uv-%E7%BB%9F%E8%AE%A1
• https://github.com/fluid-dev/hexo-theme-fluid/blob/master/source/js/leancloud.js