refactor: Remove filename deduplication to generate all 24 variants

- Removed deduplication logic from cli.py
- All 24 variants now processed (some overwrite with same filename)
- manifests: Added comments explaining cartesian product and filename behavior
- tests: Updated assertions for correct filename generation order
- Added 3 new tests for guest_agents and hardware_support modifiers

recipe-generator/cli.py

@@ -233,7 +233,6 @@ def generate_from_manifest(args: argparse.Namespace, generator: RecipeGenerator)
         sys.exit(1)
 
     # Track seen filenames to avoid overwriting duplicates
-    seen_filenames = set()
 
     # Generate all recipes
     for recipe_config in manifest.get('recipes', []):
@@ -271,11 +270,6 @@ def generate_from_manifest(args: argparse.Namespace, generator: RecipeGenerator)
             output_path = args.output_dir / filename
 
 
-            
-            if filename in seen_filenames:
-                continue  # Already generated this filename
-            seen_filenames.add(filename)
-
             if args.dry_run:
                 print(f"Would generate: {output_path}")
             else: