add robotics example

examples/server-robotics.py

+import asyncio
+import logging
+import sys
+sys.path.insert(0, "..")
+from IPython import embed
+
+
+
+from asyncua import ua, uamethod, Server
+
+
+
+async def main():
+    logging.basicConfig(level=logging.INFO)
+    server = Server()
+    await server.init()
+    # import some nodes from xml
+    await server.import_xml("../schemas/UA-Nodeset/DI/Opc.Ua.Di.NodeSet2.xml")
+    await server.import_xml("../schemas/UA-Nodeset/Robotics/Opc.Ua.Robotics.NodeSet2.xml")
+
+    # starting!
+    async with server:
+        embed()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())