[feat] Add enhanced filter UI components with search and clear functionality (#5119)

* [feat] Add enhanced filter UI components with search and clear functionality

- Add SearchBox, clear all button, and item count to MultiSelect header
- Add 'fit-content' size option to button types for flexible sizing
- Update SingleSelect and ModelSelector components for consistency
- Add localization strings for item selection and clear all functionality

Co-Authored-By: Claude <noreply@anthropic.com>

* Update locales [skip ci]

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: github-actions <github-actions@github.com>

src/components/widget/ModelSelector.vue

@@ -59,6 +59,10 @@
       <div class="relative px-6 pt-2 pb-4 flex gap-2">
         <MultiSelect
           v-model="selectedFrameworks"
+          class="w-[250px]"
+          :has-search-box="true"
+          :show-selected-count="true"
+          :has-clear-button="true"
           label="Select Frameworks"
           :options="frameworkOptions"
         />