Release 0.2.0: Direct Rector integration

Breaking Changes:
- Removed RectorFacadeFactory and RectorFacadeFactoryInterface
- Changed Rector integration approach from wrapper to direct dependency

Added:
- Direct dependency on rector/rector: 2.3.3
- Rector cache directory to .gitignore
- Backup files pattern to .gitignore

Changed:
- Made RectorTool class readonly
- Improved type safety in RectorRunner
- Updated exception handling to use Throwable import