Forbid jQuery AJAX (#29818)

Please use the fetch wrapper instead, or even better `htmx`.

Signed-off-by: Yarden Shoham <git@yardenshoham.com>
Co-authored-by: 6543 <6543@obermui.de>

Author: yardenshoham

.eslintrc.yaml

@@ -283,7 +283,7 @@ rules:
   i/unambiguous: [0]
   init-declarations: [0]
   jquery/no-ajax-events: [2]
-  jquery/no-ajax: [0]
+  jquery/no-ajax: [2]
   jquery/no-animate: [2]
   jquery/no-attr: [0]
   jquery/no-bind: [2]
@@ -396,7 +396,7 @@ rules:
   no-irregular-whitespace: [2]
   no-iterator: [2]
   no-jquery/no-ajax-events: [2]
-  no-jquery/no-ajax: [0]
+  no-jquery/no-ajax: [2]
   no-jquery/no-and-self: [2]
   no-jquery/no-animate-toggle: [2]
   no-jquery/no-animate: [2]