✨ feat(apps): add description field to all application data files

- add english and chinese description fields to all application data files
- standardize yaml formatting and indentation across all files
- remove BOM characters from several files
- fix tag indentation in multiple files
- update architecture field formatting in DecoTV and wechat-selkies
- fix crossVersionUpdate value from False to false in gitlab applications
- improve description field formatting in billion-mail application

apps/wechat-selkies/data.yml

@@ -12,6 +12,9 @@ additionalProperties:
     - Tool
   shortDescZh: 基于 Docker 的微信/QQ Linux 客户端
   shortDescEn: Docker-based WeChat/QQ Linux client
+  description:
+    en: Docker-based WeChat/QQ Linux client
+    zh: 基于 Docker 的微信/QQ Linux 客户端
   type: website
   crossVersionUpdate: true
   limit: 0
@@ -19,5 +22,5 @@ additionalProperties:
   github: https://github.com/nickrunning/wechat-selkies
   document: https://github.com/nickrunning/wechat-selkies
   architectures:
-  - amd64
-  - arm64
+    - amd64
+    - arm64