Add automatic README update hook

## Objective

Implement a hook that automatically updates README.md files when relevant code or configuration changes occur.

## Implementation Details

### Hook Trigger Conditions

- Code structure changes (new components, modules)
- Configuration changes affecting documentation
- API changes requiring documentation update

### Hook Behavior

- Detect when README updates are needed
- Generate or suggest README updates
- Optionally auto-commit changes or create review request

### Integration Points

- Claude Code hook system
- Git hooks (pre-commit, post-commit)
- CI/CD pipeline integration

### Configuration

- Define which changes trigger README updates
- Configure auto-update vs. notification mode
- Set up validation rules

## Benefits

- Keep documentation in sync with code
- Reduce manual documentation maintenance
- Catch documentation gaps early

## Deliverables

- Implemented README auto-update hook
- Configuration for hook behavior
- Documentation for hook usage
- Tests for hook functionality

## Related Tasks

Part of BA-2807 epic - Documentation consolidation

JIRA Issue: BA-2908