Feat: Назначения курсов с tags-input

✅ CourseAssignmentController (index, create, store)
✅ create.blade.php с тремя tags-input (пользователи/группы/организации)
✅ Разные цвета бейджей (зелёный/голубой/синий)
✅ UserSearchController API
✅ index.blade.php список назначений

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

routes/web.php

@@ -13,6 +13,7 @@ use App\Http\Controllers\Admin\CourseAssignmentController;
 use App\Http\Controllers\Admin\GroupUserController;
 use App\Http\Controllers\Api\OrganizationSearchController;
 use App\Http\Controllers\Api\GroupSearchController;
+use App\Http\Controllers\Api\UserSearchController;
 use App\Http\Controllers\DashboardController;
 use Illuminate\Support\Facades\Route;
 
@@ -60,5 +61,6 @@ Route::middleware('auth')->group(function () {
     Route::middleware('auth')->group(function() {
         Route::get('/api/organizations/search', OrganizationSearchController::class)->name('api.organizations.search');
         Route::get('/api/groups/search', GroupSearchController::class)->name('api.groups.search');
+        Route::get('/api/users/search', UserSearchController::class)->name('api.users.search');
     });
 });