feat(host-agent): add workspace application entrypoint

apps/device-host-agent/host_agent/cli.py

@@ -0,0 +1,12 @@
+from __future__ import annotations
+
+import argparse
+from collections.abc import Sequence
+
+from host_agent.app import create_application
+
+
+def main(argv: Sequence[str] | None = None) -> None:
+    parser = argparse.ArgumentParser(description="Run the Device Host Agent")
+    parser.parse_args(argv)
+    create_application().run()