Added total time of a course, marking chapters and courses to sync offline.

database/migrations/2022_08_18_094237_create_chapter_table.php

@@ -14,8 +14,9 @@ return new class extends Migration {
             $table->integer('order');
             $table->text('title');
             $table->text('duration')->nullable();
-            $table->text('link');
-            $table->text('video_link');
+            $table->text('link')->nullable();
+            $table->text('video_link')->nullable();
+            $table->boolean('sync_offline')->default(0);
             $table->integer('video_size');
             $table->timestamps();
         });