feat: add workflow rpc server command

tests/wf_transport_rpc_http/test_cli.py

@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from typer.testing import CliRunner
+
+from wf_transport_rpc_http.cli import app
+
+
+def test_rpc_server_cli_help_mentions_store_root() -> None:
+    result = CliRunner().invoke(app, ["--help"])
+
+    assert result.exit_code == 0
+    assert "--store-root" in result.output
+    assert "--host" in result.output
+    assert "--port" in result.output