Add feature shell for database conversion

freqtrade/commands/db_commands.py

@@ -0,0 +1,9 @@
+from typing import Any, Dict
+
+from freqtrade.configuration.config_setup import setup_utils_configuration
+from freqtrade.enums.runmode import RunMode
+
+
+def start_db_convert(args: Dict[str, Any]) -> None:
+    config = setup_utils_configuration(args, RunMode.UTIL_NO_EXCHANGE)
+    pass