feat: propagate elicitation decline and cancel actions end-to-end (#9437)

Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>
Co-authored-by: Douwe M Osinga <douwe@sidewalklabs.com>

ui/desktop/openapi.json

@@ -3918,6 +3918,9 @@
               "actionType"
             ],
             "properties": {
+              "action": {
+                "type": "string"
+              },
               "actionType": {
                 "type": "string",
                 "enum": [

ui/desktop/src/api/types.gen.ts

@@ -20,6 +20,7 @@ export type ActionRequiredData = {
     message: string;
     requested_schema: unknown;
 } | {
+    action?: string;
     actionType: 'elicitationResponse';
     id: string;
     user_data: unknown;