feat: enhance abra installation with proper verification and user commands

- Replace incorrect file-based abra verification with functional testing
- Add network connectivity monitoring to abra installer service
- Implement retry logic with proper error handling
- Add user-friendly 'install' command for manual abra repair
- Update documentation to include install command and troubleshooting
- Fix false positive detection in abra installation verification

The enhanced service now:
- Uses 'sudo abra --version' for reliable verification
- Waits for internet connectivity before attempting installation
- Retries up to 3 times with proper backoff
- Provides clear success/failure reporting
- Includes automatic service restart on failure

User can now run 'install' command as fallback when abra installation fails.

README.md

@@ -128,6 +128,7 @@ Based on Co-op Cloud with quality scoring:
 - `recipes` - Show complete Co-op Cloud catalog
 - `deploy <app>` - Deploy locally with tab completion
 - `browser [app]` - Launch Firefox [to specific app]
+- `install` - Repair abra installation if needed
 
 - `desktop` - Start GUI session
 - `help` - Show all commands and debug info
@@ -175,6 +176,15 @@ make clean         # Clean build artifacts (./build/ and ./result/)
 # Check WiFi connection (should connect automatically)
 nmcli connection show --active
 
+# Check abra installation
+sudo abra --version
+
+# Repair abra installation
+install
+
+# Check abra service status
+sudo systemctl status workshop-abra-install
+
 # Check DNS resolution
 dig @127.0.0.1 test.workshop.local