Add Customer resource to Filament admin panel: Implemented Customer model, resource, and associated pages (create, edit, list). Defined customer form schema and table configuration. Added migration for customers table.

app/Models/Customer.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Customer extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'name',
+        'email',
+        'phone',
+        'address',
+        'city',
+        'country',
+        'status',
+        'notes',
+    ];
+
+    protected $casts = [
+        'created_at' => 'datetime',
+        'updated_at' => 'datetime',
+    ];
+}