feat(tagging-system): Add comprehensive tagging system implementation

- Add tagging system Python package with modular architecture (config, core, impl)
- Create core interfaces for file discovery, content analysis, and tag generation
- Implement content analyzer with language detection and topic extraction
- Implement file discovery engine with directory scanning and filtering
- Implement tag generator with hierarchical tag creation and consolidation
- Add configuration management with example config and validation
- Create comprehensive design and requirements documentation in .kiro/specs
- Add pytest test suite with unit tests for models, interfaces, and config
- Add setup.py, requirements.txt, and pytest.ini for package management
- Add README.md with project overview and usage instructions
- Update workspace.json with new project structure
- Add Excalidraw diagram for system architecture visualization
- Establish foundation for automated vault tagging and metadata management

tagging_system/cli.py

@@ -0,0 +1,73 @@
+"""Command-line interface for the tagging system."""
+
+import argparse
+import sys
+from pathlib import Path
+from typing import Optional
+
+from .config import load_config
+
+
+def main():
+    """Main entry point for the CLI."""
+    parser = argparse.ArgumentParser(
+        description="Comprehensive Tagging System for Obsidian Vaults"
+    )
+    
+    parser.add_argument(
+        "vault_path",
+        type=str,
+        help="Path to the Obsidian vault directory"
+    )
+    
+    parser.add_argument(
+        "--config",
+        type=str,
+        help="Path to configuration file (YAML or JSON)"
+    )
+    
+    parser.add_argument(
+        "--dry-run",
+        action="store_true",
+        help="Show what would be done without making changes"
+    )
+    
+    parser.add_argument(
+        "--verbose",
+        "-v",
+        action="store_true",
+        help="Enable verbose output"
+    )
+    
+    args = parser.parse_args()
+    
+    # Validate vault path
+    vault_path = Path(args.vault_path)
+    if not vault_path.exists():
+        print(f"Error: Vault path '{vault_path}' does not exist")
+        sys.exit(1)
+    
+    if not vault_path.is_dir():
+        print(f"Error: Vault path '{vault_path}' is not a directory")
+        sys.exit(1)
+    
+    # Load configuration
+    config = load_config(args.config)
+    
+    if args.verbose:
+        print(f"Vault path: {vault_path}")
+        print(f"Configuration: {args.config or 'default'}")
+        print(f"Dry run: {args.dry_run}")
+    
+    # TODO: Implement actual tagging logic in future tasks
+    print("Tagging system setup complete!")
+    print("Note: Core implementation will be added in subsequent tasks.")
+    
+    if args.dry_run:
+        print("Dry run mode - no files would be modified")
+    
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())