chore: initial import for test contour with k3s CI

assets/controllers/selectpicker_controller.js

@@ -0,0 +1,26 @@
+import { Controller } from 'stimulus'
+import selectpicker from 'bootstrap-select'
+import 'bootstrap-select/dist/css/bootstrap-select.css'
+
+/*
+ * This is an example Stimulus controller!
+ *
+ * Any element with a data-controller="selectpicker" attribute will cause
+ * this controller to be executed. The name "selectpicker" comes from the filename:
+ * selectpicker_controller.js -> "selectpicker"
+ *
+ * Delete this file or adapt it for your use!
+ */
+export default class extends Controller {
+    connect() {
+        var placeholder = 'ничего не выбрано'
+        
+        if (this.element.dataset.placeholder) {
+            placeholder = this.element.dataset.placeholder;
+        }
+        
+        jQuery(this.element).selectpicker({
+            noneSelectedText : placeholder
+        });
+    }
+}