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

config.example.yaml

@@ -0,0 +1,30 @@
+# Example configuration for the comprehensive tagging system
+# Copy this file to config.yaml and customize as needed
+
+# Directories to exclude from processing
+excluded_directories:
+  - ".obsidian"
+  - ".git" 
+  - ".smart-env"
+  - "node_modules"
+  - "__pycache__"
+
+# File patterns to exclude
+excluded_file_patterns:
+  - "*.pyc"
+  - "*.log"
+  - "*.tmp"
+  - ".DS_Store"
+
+# Tag formatting rules
+tag_format_rules:
+  case: "kebab"  # Use kebab-case for tags
+  max_length: 50
+  allowed_chars: "abcdefghijklmnopqrstuvwxyz0123456789-/"
+  hierarchy_separator: "/"
+
+# Language detection settings
+language_detection:
+  chinese_threshold: 0.1    # Minimum ratio of Chinese characters to detect Chinese
+  mixed_threshold: 0.3      # Threshold for mixed language detection
+  min_content_length: 50    # Minimum content length for reliable detection