chinese i18n fix (#17190)

* fix: fix dialog some key capitalization

* chore: remove audio duplicate key. (i18next can't use it! maybe need change key name? )

* feat: add chinese missing keys.
fix: fix some keys error

* feat: add chinese readme file

* feat: add system feature pages embeddings i18n keys

* fix: fix audio file keys wrong

web/public/locales/zh-CN/components/dialog.json

@@ -71,7 +71,7 @@
   "streaming": {
     "label": "视频流",
     "restreaming": {
-      "disabled": "重新流式传输未启用。",
+      "disabled": "此摄像头未启用视频流转发功能。",
       "desc": {
         "title": "为此摄像头设置 go2rtc，以获取额外的实时预览选项和音频支持。",
         "readTheDocumentation": "阅读文档（英文） "