Add chinese translation (#772)

* add chinese config and i18n

* Import translation from https://bitbucket.org/mastodoncn/mastodon-zh-cn/src/master/

* translate Using Mastodon

* Translate Running Mastodon
Add Chinese search optimization
Fix some bugs

* substitute 长毛象 to Mastodon

* do some modifications.

i18n/zh-cn.toml

@@ -0,0 +1,62 @@
+[improvePage]
+other = "改进此页面"
+
+[lastUpdated]
+other = "最后更新于"
+
+[lastUpdatedDateFormat]
+other = "{{ .Format \"January 2, 2006\" }}"
+
+[joinTitle]
+other = "加入社交媒体革命"
+
+[joinText]
+other = "Mastodon是一个有超过300万用户的自由、去中心化的平台"
+
+[joinAction]
+other = "现在就加入Mastodon！"
+
+[merch]
+other = "纪念品商店"
+
+[shirtsAndStickers]
+other = "T恤衫和贴纸"
+
+[joinMastodon]
+other = "加入Mastodon"
+
+[blog]
+other = "博客"
+
+[viewSource]
+other = "查看源代码"
+
+[imprint]
+other = "版权信息"
+
+[formDataParameters]
+other = "表单数据参数"
+
+[headers]
+other = "标题"
+
+[required]
+other = "必需的"
+
+[optional]
+other = "可选的"
+
+[pathParameters]
+other = "路径参数"
+
+[queryParameters]
+other = "查询参数"
+
+[request]
+other = "请求"
+
+[response]
+other = "响应"
+
+[otherTranslations]
+other = "也可在此找到："