fix: resolve CI type annotation issues

- Add missing imports (Optional, Dict, List, TYPE_CHECKING) to affected modules
- Add return type annotation -> None for __init__ methods
- Add type annotations for ast dict and scenario variables
- Create _colorize helper function to fix invalid fg parameter
- Add type ignore comment for analyze_ambiguity return value

src/nl2gherkin/cli/interactive.py

@@ -95,7 +95,7 @@ def run_interactive_session(exporter: BaseExporter) -> None:
 
             ambiguities = analyzer.analyze_ambiguity(requirement)
             if ambiguities:
-                click.echo(_colorize("\n[WARNING] Potential ambiguities:", "yellow"))
+                click.echo(_colorize("[WARNING] Potential ambiguities:", "yellow"))
                 for amb in ambiguities:
                     click.echo(f"  - {amb.message}")
                     if amb.suggestion: