Implement ProtocolTemplateEditor

Summary

This merge request implements the editor for the ProtocolTemplate asset

Relevant issue(s) fixed

Fixes #210 (closed)

beat/editor/test/test_editors.py

@@ -109,10 +109,7 @@ class TestMockEditor:
         field.format_name = "value32"
         field.format_type = "float32"
 
-        assert widget.dump_json() == {
-            "field": {"value32": "float32"},
-            "description": "",
-        }
+        assert widget.dump_json() == {"field": {"value32": "float32"}}
 
         qtbot.mouseClick(widget.add_field_button, QtCore.Qt.LeftButton)
         fields = widget.findChildren(FieldWidget)
@@ -125,6 +122,5 @@ class TestMockEditor:
         field.format_type = "float64"
 
         assert widget.dump_json() == {
-            "field": {"value32": "float32", "value64": "float64"},
-            "description": "",
+            "field": {"value32": "float32", "value64": "float64"}
         }