Remove deprecated app_new.py and consolidate main application logic into main.py

- Deleted `app_new.py`, which was previously the main entry point for the dashboard application, to streamline the codebase.
- Consolidated the application initialization and callback registration logic into `main.py`, enhancing modularity and maintainability.
- Updated the logging and error handling practices in `main.py` to ensure consistent application behavior and improved debugging capabilities.

These changes simplify the application structure, aligning with project standards for modularity and maintainability.

data/collector/collector_connection_manager.py

@@ -27,6 +27,7 @@ class ConnectionManager:
                  reconnect_delay: float = 5.0,
                  logger=None,
                  state_telemetry: CollectorStateAndTelemetry = None):
+        
         self.exchange_name = exchange_name
         self.component_name = component_name
         self._max_reconnect_attempts = max_reconnect_attempts