Add configuration options for models, notifications, QR code backend, and trusted device settings in README

Author: moaalaa

README.md

@@ -134,15 +134,96 @@ Event::listen(Logout::class, function ($event) {
 ### 5️⃣ Customize settings from the config file
 
 ```php
+<?php
+
 return [
+
+    /*
+    |--------------------------------------------------------------------------
+    | Models Configuration
+    |--------------------------------------------------------------------------
+    |
+    | Define the models used by the package here. These models will be used
+    | for users and trusted device storage.
+    |
+    */
+
     'user_model' => \App\Models\User::class,
+
     'trust_device_model' => \MixCode\FilamentMulti2fa\Models\TrustDevice::class,
+
+    /*
+    |--------------------------------------------------------------------------
+    | Notifications
+    |--------------------------------------------------------------------------
+    |
+    | Specify the notification class responsible for sending the OTP code
+    | to the user.
+    |
+    */
+
     'otp_notification_class' => \MixCode\FilamentMulti2fa\Notifications\TwoFactorCodeNotification::class,
+
+    /*
+    |--------------------------------------------------------------------------
+    | QR Code Rendering Backend
+    |--------------------------------------------------------------------------
+    |
+    | Choose the QR code rendering service to generate the QR Code for TOTP.
+    |
+    | Supported Services:
+    |
+    | 1. BaconQrCode (default):
+    |    - Renders PNG (inline or file)
+    |    - Requires the Imagick PHP extension (depending on backend)
+    |    - Can render SVG with custom setup, but PNG is common default
+    |
+    | 2. chillerlan/php-qrcode:
+    |    - Outputs base64-encoded PNG by default
+    |    - Supports SVG rendering via OUTPUT_MARKUP_SVG
+    |    - Does NOT require Imagick or GD by default for PNG base64
+    |    - Other formats (PNG file, SVG file) may require GD/Imagick if saved to disk
+    |
+    */
+
+    // Default to BaconQrCode
+    'qr_code_backend_service' => \PragmaRX\Google2FAQRCode\QRCode\Bacon::class,
+
+    // To use chillerlan/php-qrcode (SVG by default), uncomment below:
+    // 'qr_code_backend_service' => \PragmaRX\Google2FAQRCode\QRCode\Chillerlan::class,
+
+    /*
+    |--------------------------------------------------------------------------
+    | OTP View Template
+    |--------------------------------------------------------------------------
+    |
+    | Specify the Blade view that will be used for rendering the OTP email.
+    |
+    */
+
     'otp_view' => 'filament-multi-2fa::emails.2fa.otp',
+
+    /*
+    |--------------------------------------------------------------------------
+    | Trusted Device Settings
+    |--------------------------------------------------------------------------
+    |
+    | Configure trusted device cookie settings, including cookie name,
+    | lifespan in minutes, and cache settings to minimize DB hits.
+    |
+    */
+
     'trusted_device_cookie_name' => 'trusted_device',
+
+    // Duration (in minutes) before a trusted device expires in the database
     'trusted_device_db_expiration' => 60 * 24 * 30, // 30 days
+
+    // Duration (in minutes) before a trusted device cookie expires
     'trusted_device_cookie_lifespan' => 60 * 24 * 30, // 30 days
+
+    // Duration (in minutes) to cache trusted device checks to reduce DB queries
     'trust_device_check_cache_lifespan' => 60 * 24 * 30, // 30 days
+
 ];
 ```