refactor: rename package from RNS.Interfaces to ble_reticulum

Fixes namespace collision with Reticulum's own RNS.Interfaces package.
When both packages were installed, the collision caused import issues
and prevented BLE discovery between devices.

Changes:
- Rename src/RNS/Interfaces/ to src/ble_reticulum/
- Update pyproject.toml package configuration
- Update all imports in source and test files

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

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

tests/test_hci_error_fixes.py

@@ -56,7 +56,7 @@ class TestEventDrivenDBusMonitor:
     @pytest.fixture
     def mock_gatt_server(self, mock_driver):
         """Create mock GATT server with event-driven monitoring setup."""
-        from RNS.Interfaces.linux_bluetooth_driver import BluezeroGATTServer
+        from ble_reticulum.linux_bluetooth_driver import BluezeroGATTServer
 
         server = Mock(spec=BluezeroGATTServer)
         server.driver = mock_driver