feat: addition of a new rule to check for 'operationId' field

Author: dimakis

spectral/ruleset.yaml

@@ -166,4 +166,11 @@ rules:
               required: true
             total:
               type: integer
-              required: true
+              required: true
+  rhoas-operaton-id:
+    severity: warn
+    recommended: true
+    given: "$.paths.*.*"
+    then:
+      function: truthy
+      field: operationId