feat: Implement VNPAY callback redirection to frontend and add UUID/public code to transactions.

database/migrations/2024_05_13_165053_transaction.php

@@ -9,6 +9,7 @@ return new class extends Migration {
     {
         Schema::create('transactions', function (Blueprint $table) {
             $table->id();
+            $table->uuid();
             $table->string('trans')->nullable();
             $table->integer('amount')->nullable();