refactor: consolidate type system and improve documentation

- Move type definitions from src/types/ to src/interfaces/ for better organization
- Enhance deep linking type system documentation with detailed examples
- Update package dependencies to latest versions
- Improve code organization in README.md
- Fix formatting in WebPlatformService.ts

This change consolidates all type definitions into the interfaces folder,
improves type safety documentation, and updates dependencies for better
maintainability. The deep linking system now has clearer documentation
about its type system and validation approach.

Breaking: Removes src/types/ directory in favor of src/interfaces/

.cursor/rules/architectural_decision_record.mdc

@@ -31,7 +31,7 @@ src/
 ├── electron/      # Electron-specific code
 ├── constants/     # Application constants
 ├── db/           # Database related code
-├── interfaces/    # TypeScript interfaces
+├── interfaces/    # TypeScript interfaces and type definitions
 └── assets/        # Static assets
 ```