Implement feature flags and update views

This commit implements feature flags using the "ylsideas/feature-flags" library and updates various frontend views to show or hide sections based on the feature flag. Additionally, a new migration file is created for the features database table and the LibraryItem model is updated with a new searchLibraryItems function. The composer.json and composer.lock files are updated to include the new dependencies.

app/Models/LibraryItem.php

@@ -164,4 +164,17 @@ class LibraryItem extends Model implements HasMedia, Sortable, Feedable
                              ->link(url()->route('article.view', ['libraryItem' => $this]))
                              ->authorName($this->lecturer->name);
     }
+
+    public static function searchLibraryItems($type, $value = null)
+    {
+        $query = self::query()
+            ->where('type', $type)
+            ->latest('id');
+
+        if ($value) {
+            $query->where('name', 'ilike', "%{$value}%");
+        }
+
+        return $query->get();
+    }
 }