[Feature Request] Improved app migration to include app-related files

**Is your feature request related to a problem? Please describe.**
macOS apps usually have many extra-bundle paths where they store files, such as configurations, settings, and caches.

**Describe the solution you'd like**
Include those files in the app migration. The app should parse all possible “external” paths to search for app-related files and include them in the migration workflow.
