add waline comment system support.

[SX1ang]

Add Waline comment system support.

Preview :

but when the theme switches to dark mode, the color of waline doesn't change. The solution is add code as follows to themes\cactus\source\css_partial\comments.styl file:

:root {
  /* 常规颜色 */
  --waline-white: #000 !important;
  --waline-light-grey: #666 !important;
  --waline-dark-grey: #999 !important;

  /* 布局颜色 */
  --waline-color: #888 !important;
  --waline-bgcolor: #1e1e1e !important;
  --waline-bgcolor-light: #272727 !important;
  --waline-border-color: #333 !important;
  --waline-disable-bgcolor: #444 !important;
  --waline-disable-color: #272727 !important;

  /* 特殊颜色 */
  --waline-bq-color: #272727 !important;

  /* 其他颜色 */
  --waline-info-bgcolor: #272727 !important;
  --waline-info-color: #666 !important;
}

Preview: