- Define Route and RouteDefinition classes with SRP focus
- Implement Router class with Inversion of Control (DI for config)
- Create Config object for handling modules_path, routes_file, and modules_glob
- Implement MissingConfigurationException
- Setup basic PHPUnit suite with comprehensive tests
All tests passing: 11 tests, 24 assertions
Closes milestone 1 from MILESTONES.md
