[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/stories/kitchen-sink/components/kitchen-sink-form.component.ts

@@ -23,6 +23,7 @@ import { KitchenSinkSharedModule } from "../kitchen-sink-shared.module";
           inputMaxValue: (max) => `Input value must not exceed ${max}.`,
           inputMinValue: (min) => `Input value must be at least ${min}.`,
           inputRequired: "Input is required.",
+          loading: "Loading",
           multiSelectClearAll: "Clear all",
           multiSelectLoading: "Retrieving options...",
           multiSelectNotFound: "No items found",

libs/components/src/stories/kitchen-sink/kitchen-sink.stories.ts

@@ -64,6 +64,7 @@ export default {
               toggleSideNavigation: "Toggle side navigation",
               yes: "Yes",
               no: "No",
+              loading: "Loading",
             });
           },
         },