Setup TypeScript Best Practices

Create or update CLAUDE.md in with following content, write it strictly as it is, do not summaraise or introduce and new additional information:

## Code Style Rules

### General Principles

- **TypeScript**: All code must be strictly typed, leverage TypeScript's type safety features

### Code style rules

- Interfaces over types - use interfaces for object types
- Use enum for constant values, prefer them over string literals
- Export all types by default
- Use type guards instead of type assertions

### Best Practices