🚚 feat(context): integrate context app into monorepo

Restructure the context app (formerly basetext) to follow the monorepo
pattern with proper workspace configuration.

Changes:
- Move app files to apps/context/apps/mobile/
- Rename package to @context/mobile
- Update bundle ID to com.manacore.context
- Create pnpm-workspace.yaml for project workspace
- Add dev scripts to root package.json
- Update CLAUDE.md with project documentation

The app structure is prepared for future web/backend additions.

Note: Existing TypeScript errors in the original codebase are preserved.
These should be fixed in a follow-up PR.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/context/apps/mobile/.env.example

@@ -0,0 +1,7 @@
+# API-Schlüssel für KI-Dienste
+OPENAI_API_KEY=your_openai_api_key_here
+GOOGLE_API_KEY=your_google_api_key_here
+
+# Andere Umgebungsvariablen
+# SUPABASE_URL=your_supabase_url
+# SUPABASE_ANON_KEY=your_supabase_anon_key