refactor: update components to use new validation and output structures

Updates cross-file validation, discovery, orchestration, and output layers:
- crossfile.go: Delegates to new helper modules (crossfile_graph, crossfile_refs)
- discovery.go: Maintains type pattern consistency for file type detection
- orchestrator.go: Coordinates updated linting pipeline
- console.go: Integrates with new formatter structure
- console_test.go: Updated tests for console output

Ensures all components work seamlessly with the new ISP-based linter architecture and output formatters.

Author: Test User