docs: add vuepress-theme-hope (#75)

Author: Mister-Hope

README.md

@@ -40,6 +40,7 @@ Please head [documentation](https://vuepress-plugin-blog.ulivz.com/) to see all
 - [@vuepress/theme-blog](https://github.com/ulivz/vuepress-theme-blog): Default blog theme for VuePress.
 - [vuepress-theme-modern-blog](https://github.com/z3by/vuepress-theme-modern-blog): A modern theme for Vue press using [Element.UI design system](https://element.eleme.io/#/)
 - [vuepress-theme-reco](https://github.com/vuepress-reco/vuepress-theme-reco) - A simple and beautiful vuepress blog theme
+- [vuepress-theme-hope](https://github.com/Mister-Hope/vuepress-theme-hope/) - A powerful vuepress blog theme with tons of features.
 - [vuepress-theme-yuchanns](https://github.com/yuchanns/vuepress-theme-yuchanns): A github style vuepress blog theme
 - [vuepress-theme-ic](https://github.com/IKangXu/vuepress-theme-ic) :tada::tada::tada: A note-style vuepress blog theme with simple, clear and practical features for the purpose. The palest ink is better than the best memory.