feat(customers): tambahkan model dan migrasi untuk tabel customers

- Menambahkan model Customer dengan relasi ke akun dan cabang.
- Membuat migrasi untuk tabel customers dengan kolom yang diperlukan.

app/Models/Customer.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Modules\Webstatement\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Modules\Basicdata\Models\Branch;
+
+class Customer extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'customer_code',
+        'name',
+        'address',
+        'branch_code',
+        'date_of_birth',
+        'email',
+    ];
+
+    public function accounts(){
+        return $this->hasMany(Account::class, 'customer_code', 'customer_code');
+    }
+
+    public function branch(){
+        return $this->belongsTo(Branch::class, 'branch_code', 'code');
+    }
+}

database/migrations/2025_02_06_072406_create_customers_table.php

@@ -0,0 +1,33 @@
+<?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::create('customers', function (Blueprint $table) {
+            $table->id();
+            $table->string('customer_code')->unique();
+            $table->string('name')->nullable();
+            $table->text('address')->nullable();
+            $table->string('branch_code')->nullable();
+            $table->string('date_of_birth')->nullable();
+            $table->string('email')->nullable();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('customers');
+    }
+};