Tambahkan field nominal_bayar untuk persetujuan penawaran

- Menambahkan validasi dan atribut 'nominal_bayar' pada request dan model.
- Menampilkan input 'nominal_bayar' di form persetujuan penawaran.
- Memperbarui tampilan dan data tabel untuk mendukung kolom 'nominal_bayar'.

database/migrations/2024_12_19_040336_update_persetujuan_penawaran_table.php

@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('persetujuan_penawaran', function (Blueprint $table) {
+            $table->double('nominal_bayar')->nullable()->after('bukti_bayar');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('persetujuan_penawaran', function (Blueprint $table) {
+            $table->dropColumn('nominal_bayar');
+        });
+    }
+};