标准化opcua设备接入unilab (#78)

* 初始提交，只保留工作区当前状态

* remove redundant arm_slider meshes

---------

Co-authored-by: Junhan Chang <changjh@dp.tech>

unilabos/registry/devices/opcua_example.yaml

@@ -0,0 +1,12 @@
+opcua_example:
+  class:
+    action_value_mappings:
+      
+    module: unilabos.device_comms.opcua_client.client:OpcUaClient
+    status_types:
+
+    type: python
+  description: 
+  handles: []
+  icon: ''
+  init_param_schema: {}