This PR removes all extra deps from the `learn` app. The `learn` app was
copy-pasted from `ui-library` so it had a lot of unneeded deps.
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## Summary by CodeRabbit
* **Chores**
* Streamlined project dependencies by removing unused packages, reducing
the overall dependency surface for better performance and
maintainability.
* Enhanced build cleanup process to remove temporary TypeScript build
artifacts alongside existing cleanup tasks.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
wip
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-->
## Summary by CodeRabbit
# Release Notes
* **New Features**
* Added a new Learn application offering foundational Supabase courses
with interactive documentation
* Courses include Architecture, Authentication, Data Fundamentals,
Security, Storage, Realtime, and Edge Functions
* Chapter tracking and progress indicators for course completions
* Responsive sidebar navigation with search/command menu
* Theme switching support (light, dark, classic dark modes)
* Mobile-friendly course interface
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Alan Daniel <stylesshjs@gmail.com>
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
Ivan Vasilov