feat(rest): add +jq flag

Adds support for setting variables from results using jq expressions.

Ref: https://github.com/pashky/restclient.el
Ref: https://github.com/ljos/jq-mode
Close: #5238

modules/lang/rest/config.el

@@ -33,3 +33,13 @@ certs, rather than reject them silently."
   :when (featurep! :completion company)
   :after restclient
   :config (set-company-backend! 'restclient-mode 'company-restclient))
+
+
+(use-package! restclient-jq
+  :when (featurep! +jq)
+  :after restclient)
+
+
+(use-package! jq-mode
+  :when (featurep! +jq)
+  :after restclient-jq)