✨ 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/perfree-blog/data.yml

@@ -1,19 +1,22 @@
 name: PerfreeBlog
 tags:
-    - 建站
+  - 建站
 title: 开源的博客/CMS 建站工具
 description: 开源的博客/CMS 建站工具
 additionalProperties:
-    key: perfree-blog
-    name: PerfreeBlog
-    tags:
-        - Website
-    shortDescZh: 开源的博客/CMS 建站工具
-    shortDescEn: open source blog/CMS website builder
-    type: website
-    crossVersionUpdate: true
-    limit: 0
-    recommend: 0
-    website: https://perfree.org.cn/
-    github: https://github.com/PerfreeBlog/PerfreeBlog
-    document: https://perfree.org.cn/useDocs/
+  key: perfree-blog
+  name: PerfreeBlog
+  tags:
+    - Website
+  shortDescZh: 开源的博客/CMS 建站工具
+  shortDescEn: open source blog/CMS website builder
+  description:
+    en: open source blog/CMS website builder
+    zh: 开源的博客/CMS 建站工具
+  type: website
+  crossVersionUpdate: true
+  limit: 0
+  recommend: 0
+  website: https://perfree.org.cn/
+  github: https://github.com/PerfreeBlog/PerfreeBlog
+  document: https://perfree.org.cn/useDocs/