Feat: Add invoke and github operators #3221 (#9112)

### What problem does this PR solve?

Feat: Add invoke and github operators #3221

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/agent/canvas/node/dropdown/next-step-dropdown.tsx

@@ -109,6 +109,9 @@ function AccordionOperators() {
               Operator.Wikipedia,
               Operator.GoogleScholar,
               Operator.ArXiv,
+              Operator.PubMed,
+              Operator.GitHub,
+              Operator.Invoke,
             ]}
           ></OperatorItemList>
         </AccordionContent>