fix: update paths in installer, tests, and workflows for package rename

- Update install.sh to copy from src/ble_reticulum/
- Update test files with new source paths
- Update GitHub workflows for new package structure
- Remove temporary refactoring helper scripts

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

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

.github/workflows/deploy.yml

@@ -137,7 +137,7 @@ jobs:
           mkdir -p ~/.reticulum/interfaces || exit 1
 
           echo '  [6/8] Copying interface files...'
-          cp -v src/RNS/Interfaces/*.py ~/.reticulum/interfaces/ || exit 1
+          cp -v src/ble_reticulum/*.py ~/.reticulum/interfaces/ || exit 1
 
           echo '  [7/8] Stopping rnsd and clearing logs...'
           RNSD_BIN=\"\$HOME/.local/bin/rnsd\"