Ask - whether available for follow-up questions

Signed-off-by: sy-b <94835959+sy-b@users.noreply.github.com>

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -28,4 +28,12 @@ body:
     options:
       - label: "Yes"
       - label: "No"
+- type: dropdown
+  attributes:
+    label: "Will you be available for follow-up questions to help developers implement this?"
+    options: 
+      - "Yes"
+      - "No"
+  validations:
+    required: true