save movies release date in BDD, remove unused badge, add help to export movie from letterboxd

assets/controllers/import_help_controller.js

@@ -0,0 +1,20 @@
+import { Controller } from '@hotwired/stimulus';
+
+export default class extends Controller {
+    static targets = ['overlay'];
+
+    open(event) {
+        event.stopPropagation();
+        this.overlayTarget.hidden = false;
+    }
+
+    close() {
+        this.overlayTarget.hidden = true;
+    }
+
+    closeOnBackdrop(event) {
+        if (event.target === this.overlayTarget) {
+            this.close();
+        }
+    }
+}