feat: set up Python project structure with pyproject.toml

- Add pyproject.toml with core and dev dependencies
- Configure Ruff for linting and formatting
- Configure MyPy for strict type checking
- Configure pytest with asyncio support
- Create src/polymarket_insider_tracker package structure
- Add py.typed marker for PEP 561 compliance
- Add pre-commit hooks configuration
- Add comprehensive .gitignore
- Create test directory structure with basic tests

Closes #25

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/test_setup.py

@@ -0,0 +1,24 @@
+"""Test that the project setup is working correctly."""
+
+import polymarket_insider_tracker
+
+
+def test_version() -> None:
+    """Test that version is defined."""
+    assert polymarket_insider_tracker.__version__ == "0.1.0"
+
+
+def test_import_modules() -> None:
+    """Test that all submodules can be imported."""
+    from polymarket_insider_tracker import ingestor
+    from polymarket_insider_tracker import profiler
+    from polymarket_insider_tracker import detector
+    from polymarket_insider_tracker import alerter
+    from polymarket_insider_tracker import storage
+
+    # Just verify imports work
+    assert ingestor is not None
+    assert profiler is not None
+    assert detector is not None
+    assert alerter is not None
+    assert storage is not None