Clean up unused code and improve documentation

**Removed:**
- AppViewInterface.ts (no longer needed with new app structure)
- Duplicate and unused functions from KlaviyoReactWrapper.ts
- Legacy random data setters (setEmail, setPhoneNumber, setExternalId)
- Unused getters (getEmail, getPhoneNumber, getExternalId, getPushToken)
- Complex unused functions (setProfile, setProfileAttribute, setPushToken)
- Unused imports (Location, Profile, ProfileProperty, random generators)

**Improved:**
- Added comprehensive JSDoc comments to all exported functions
- Organized code into clear sections (Initialization, Profile, Events, Forms, Push)
- Simplified error handling with consistent patterns
- Better function descriptions explaining purpose and behavior
- Noted iOS-only methods where applicable

The wrapper now contains only the functions actually used by the example app,
making it cleaner, easier to understand, and better as a reference for developers.

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

Co-Authored-By: Claude <[email protected]>

� Conflicts:
�	example/src/AppViewInterface.ts
�	example/src/KlaviyoReactWrapper.ts

Author: Evan Masseau