feat: Enhance dataset management and improve frontend components

- Added preloads 'allowed_extensions_mimetypes' and 'dependent_array_min_length' in adonisrc.ts
- Updated @symfony/webpack-encore from ^4.6.1 to ^5.0.1
- AdminuserController: Implemented pagination for 10 records in index method
- Enabled reviewers to reject datasets to editors with email notifications (DatasetController.ts)
- Submitter DatasetController: Files now loaded in ascending order (sort_order) in edit mode
- file.ts: Removed serialization of fileData due to browser issues
- Modified FileUpload.vue to mark already uploaded files as deleted
- Improved keyword search in SearchCategoryAutocomplete.vue
- Started development on Category.vue for submitters to categorize DDC
- Added new route /dataset/categorize in routes.ts
- Introduced 2 new rules in start/rules: allowed_extensions_mimetypes.ts and dependent_array_min_length.ts
- Performed npm updates

resources/js/Pages/Submitter/Dataset/Create.vue

@@ -965,6 +965,11 @@ Removes a selected keyword
 
                         <CardBox class="mb-6 shadow" has-table title="Dataset References" :header-icon="mdiPlusCircle"
                             v-on:header-icon-click="addReference">
+                             <!-- Message when no references exist -->
+                            <div v-if="form.references.length === 0" class="text-center py-4">
+                                <p class="text-gray-600">No references added yet.</p>
+                                <p class="text-gray-400">Click the plus icon above to add a new reference.</p>
+                            </div>
                             <table class="table-fixed border-green-900" v-if="form.references.length">
                                 <thead>
                                     <tr>