feat(docs): add execution flow docs for Bowl, Drivelution, Extension, Avalonia.Android, Maui.Android (#141)

- Add 5 new Chinese flow docs (Bowl/Drivelution/Extension/Avalonia.Android/Maui.Android)
- Add 5 corresponding English i18n translations
- Restructure sidebar: group all flow docs under a collapsible '执行流程详解' category
- Update sidebar_label for all flow docs with component-specific names
- Add English i18n label for the new category

Author: JusterZhu

website/docs/doc/Avalonia.Android-flow.md

@@ -1,6 +1,6 @@
 ---
 sidebar_position: 4
-sidebar_label: 执行流程详解
+sidebar_label: Core 执行流程
 ---
 
 # GeneralUpdate.Core — 执行流程详解