✨ 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/timestamp-server/data.yml

@@ -6,8 +6,11 @@ additionalProperties:
   limit: 0
   name: timestamp-server
   shortDescEn: timestamp-server
+  description:
+    en: timestamp-server
+    zh: 时间戳服务器
   shortDescZh: 时间戳服务器
   tags:
-  - Tool
+    - Tool
   type: runtime
   website: https://github.com/dnl50/tsa