Refactor into modular structure with improvements

- Split monolithic intercept.py (15k lines) into modular structure:
  - routes/ - Flask blueprints for each feature
  - templates/ - Jinja2 HTML templates
  - data/ - OUI database, satellite TLEs, detection patterns
  - utils/ - dependencies, process management, logging
  - config.py - centralized configuration with env var support

- Add type hints to function signatures
- Replace bare except clauses with specific exceptions
- Add proper logging module (replaces print statements)
- Add environment variable support (INTERCEPT_* prefix)
- Add test suite with pytest
- Add Dockerfile for containerized deployment
- Add pyproject.toml with ruff/black/mypy config
- Add requirements-dev.txt for development dependencies

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

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

routes/__init__.py

@@ -0,0 +1,19 @@
+# Routes package - registers all blueprints with the Flask app
+
+def register_blueprints(app):
+    """Register all route blueprints with the Flask app."""
+    from .pager import pager_bp
+    from .sensor import sensor_bp
+    from .wifi import wifi_bp
+    from .bluetooth import bluetooth_bp
+    from .adsb import adsb_bp
+    from .satellite import satellite_bp
+    from .iridium import iridium_bp
+
+    app.register_blueprint(pager_bp)
+    app.register_blueprint(sensor_bp)
+    app.register_blueprint(wifi_bp)
+    app.register_blueprint(bluetooth_bp)
+    app.register_blueprint(adsb_bp)
+    app.register_blueprint(satellite_bp)
+    app.register_blueprint(iridium_bp)