refactor(amazonq): refactor, remove shortAnswer to suit the API changes, display the plan summary to the customer (#5453)

* API refactor

* update the code

* add contribution file

* correct the Endpoint

* add plan summary to the card

* remove the unused command

* formatting the plan summary

* nit change

* nit

* address comment

* remove unused comment

* add changelog

* address comment

* put the short answer method to plain text

* address comment

* formatting the service-2 json to remove extra space

* fix lint issue

* remove the redundant qualifier name

* fix indenting issue

* reroll service-2 to public version

* fix the customer face error message

* Update feature-862af662-3a71-4203-aa1b-bfa41af24b42.json

* Delete wrong changelog

Author: Randall-Jiang

.changes/next-release/feature-862af662-3a71-4203-aa1b-bfa41af24b42.json

@@ -0,0 +1,4 @@
+{
+  "type" : "feature",
+  "description" : "AmazonQ /test now displays a concise test plan summary to users."
+}