汉化并且增强现有文档

我们的很多文档和资料基本都是英文，并不方便国内的小伙伴们参与并且贡献代码。

需要做的事情：
* [ ] 更新 [README](https://github.com/FreeCodeCampChina/freecodecamp.cn/blob/dev/README.md)
* [ ] 汉化 [贡献者指南](https://github.com/freecodecampchina/freecodecamp.cn/blob/dev/CONTRIBUTING.md)
* [ ] 汉化 [Pull request模板](https://github.com/FreeCodeCampChina/freecodecamp.cn/blob/dev/.github/PULL_REQUEST_TEMPLATE.md)
* [ ] 修复文档失效链接
* [ ] 增强[wiki](https://github.com/FreeCodeCampChina/freecodecamp.cn/wiki)
* [x] 汉化freeCodeCamp.cn [内部提交BUG的模板](https://github.com/FreeCodeCampChina/freecodecamp.cn/blob/dev/client/commonFramework/report-issue.js)
* [ ] 增加并汉化[forum.freeCodeCamp.com论坛答案](https://forum.freecodecamp.com/c/wiki)
- [x] [Basic Algorithm 完成](https://github.com/FreeCodeCampChina/freecodecamp.cn/wiki/basic-content)
- [x] [Intermediate Algorithm](https://github.com/FreeCodeCampChina/freecodecamp.cn/projects/2)
- [ ] [Advanced Algorithm](https://github.com/FreeCodeCampChina/freecodecamp.cn/projects/3)

Review README.md, CONTRIBUTING.md, .github/PULL_REQUEST_TEMPLATE.md, the linked wiki pages, and the forum-answer references listed in the issue. Start by auditing the unchecked documents and their links; done means the requested Chinese translations, link fixes, wiki improvements, and Advanced Algorithm content are completed and checked off.

Written by the indexing model from the issue text.