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

tests/conftest.py

@@ -0,0 +1,124 @@
+"""Pytest configuration and fixtures."""
+
+import pytest
+from pathlib import Path
+from datetime import datetime
+from typing import List
+from hypothesis import settings, Verbosity
+
+from tagging_system.core.models import (
+    FileInfo, 
+    ContentAnalysis, 
+    TagStructure, 
+    FrontmatterData,
+    ContentType,
+    LanguageInfo
+)
+from tagging_system.config import TaggingConfig
+
+
+# Configure hypothesis for property-based testing
+settings.register_profile("default", max_examples=100, verbosity=Verbosity.normal)
+settings.register_profile("ci", max_examples=1000, verbosity=Verbosity.verbose)
+settings.load_profile("default")
+
+
+@pytest.fixture
+def sample_file_info() -> FileInfo:
+    """Create a sample FileInfo for testing."""
+    return FileInfo(
+        path="100-project/AI/test.md",
+        name="test.md",
+        directory="100-project/AI",
+        extension=".md",
+        size=1024,
+        created=datetime(2024, 1, 1, 12, 0, 0),
+        modified=datetime(2024, 1, 2, 12, 0, 0),
+        content="# Test File\n\nThis is a test file about AI and machine learning."
+    )
+
+
+@pytest.fixture
+def sample_content_analysis() -> ContentAnalysis:
+    """Create a sample ContentAnalysis for testing."""
+    return ContentAnalysis(
+        language=LanguageInfo.ENGLISH,
+        content_type=ContentType.NOTE,
+        topics=["ai", "machine-learning", "technology"],
+        mentions={
+            'tools': ['python', 'tensorflow'],
+            'technologies': ['ai', 'ml'],
+            'people': [],
+            'organizations': ['openai']
+        },
+        sentiment="neutral",
+        complexity="intermediate"
+    )
+
+
+@pytest.fixture
+def sample_tag_structure() -> TagStructure:
+    """Create a sample TagStructure for testing."""
+    return TagStructure(
+        primary=["project"],
+        hierarchical=["tech/ai", "tech/ml"],
+        content=["python", "tensorflow"],
+        meta=["lang/en", "type/note"],
+        custom=["custom-tag"]
+    )
+
+
+@pytest.fixture
+def sample_frontmatter_data() -> FrontmatterData:
+    """Create a sample FrontmatterData for testing."""
+    return FrontmatterData(
+        title="Test File",
+        tags=["project", "tech/ai", "python"],
+        created="2024-01-01",
+        updated="2024-01-02",
+        type="note",
+        lang="en",
+        aliases=["test"],
+        description="A test file for AI projects"
+    )
+
+
+@pytest.fixture
+def default_config() -> TaggingConfig:
+    """Create a default TaggingConfig for testing."""
+    return TaggingConfig()
+
+
+@pytest.fixture
+def temp_vault_structure(tmp_path: Path) -> Path:
+    """Create a temporary vault structure for testing."""
+    vault_root = tmp_path / "test_vault"
+    
+    # Create directory structure
+    directories = [
+        "100-project/AI",
+        "100-project/Infrastructure", 
+        "200-area/Productivity",
+        "200-area/Health",
+        "300-resources/Development",
+        "400-archive",
+        "Clippings",
+        "ReadItLater Inbox"
+    ]
+    
+    for directory in directories:
+        (vault_root / directory).mkdir(parents=True, exist_ok=True)
+    
+    # Create sample files
+    sample_files = [
+        ("100-project/AI/llm-notes.md", "# LLM Notes\n\nNotes about large language models."),
+        ("200-area/Productivity/gtd.md", "# Getting Things Done\n\nProductivity methodology."),
+        ("300-resources/Development/python.md", "# Python Resources\n\nPython development resources."),
+        ("Clippings/article.md", "# Interesting Article\n\nClipped from web.")
+    ]
+    
+    for file_path, content in sample_files:
+        file_full_path = vault_root / file_path
+        file_full_path.write_text(content, encoding='utf-8')
+    
+    return vault_root