✨ 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/libretv/data.yml

@@ -6,8 +6,11 @@ additionalProperties:
   limit: 0
   name: LibreTV
   shortDescEn: mPure Go open-source one-stop streaming media server development framework
+  description:
+    en: mPure Go open-source one-stop streaming media server development framework
+    zh: 轻量级、免费的在线视频搜索与观看平台
   shortDescZh: 轻量级、免费的在线视频搜索与观看平台
   tags:
-  - Tool
+    - Tool
   type: website
-  website: https://libretv.is-an.org/
+  website: https://libretv.is-an.org/