add openjtalk worker pkg

text/pyopenjtalk_worker/__main__.py

@@ -0,0 +1,16 @@
+import argparse
+
+from .worker_server import WorkerServer
+from .worker_common import WOKER_PORT
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--port", type=int, default=WOKER_PORT)
+    args = parser.parse_args()
+    server = WorkerServer()
+    server.start_server(port=args.port)
+
+
+if __name__ == "__main__":
+    main()