[CL-95] loading spinner (#16363)

* add spiner from previous branch

* add loading spinner to button

* Add spinner to dialog

* Add spinner to icon button

* add spinner to multi select component

* fix spinner positioning

* Add mock i18n in stories where needed

* round stroke caps. Update classes

* fix ts error

* fix broken tests

* add missing translation keys to stories

* Add mising key for layout

* Add mising key for nav group

* Add mising key for spotlight

* Add mising key for product switcher

* Add mising key for dialog service

* add translation to copy click story

libs/components/src/item/item.stories.ts

@@ -44,6 +44,7 @@ export default {
               skipToContent: "Skip to content",
               submenu: "submenu",
               toggleCollapse: "toggle collapse",
+              loading: "Loading",
             });
           },
         },