feat: 新增一个社区主题 (#37)

Author: MageeLin

README.md

@@ -39,6 +39,7 @@ highlight: juejin # 代码高亮主题，默认值：theme 中指定
 | [healer-readable](https://github.com/dunizb/juejin-markdown-theme-healer-readable) | [healer](https://juejin.cn/user/1415826709689208) | MIT |
 | [mk-cute](https://github.com/Jacky-Summer/juejin-markdown-theme-mk-cute) | [JackySummer](https://juejin.cn/user/1257497033714477) | MIT |
 | [jzman](https://github.com/jzmanu/juejin-markdown-theme-jzman) | [躬行之](https://juejin.cn/user/3526889030301325) | MIT |
+| [geek-black](https://github.com/MageeLin/juejin-markdown-theme-geek-black) | [林景宜](https://juejin.cn/user/404232342875966) | MIT |
 
 ### 代码高亮
 

themes.js

@@ -89,4 +89,11 @@ export default {
     ref: 'db6816e',
     highlight: 'monokai',
   },
+  'geek-black': {
+    owner: 'MageeLin',
+    repo: 'juejin-markdown-theme-geek-black',
+    path: 'geek-black.scss',
+    ref: '2152a4c',
+    highlight: 'monokai',
+  },
 };