feat: implement custom logout response and register service provider

[gvieira18]

This pull request introduces a custom logout response for Filament and ensures it is properly registered and used throughout the application. The main changes include implementing the custom response, binding it to the Filament contract, and updating the service provider registration.

Custom Logout Response Implementation:

• Added a new LogoutResponse class in app/Filament/Shared/Responses/LogoutResponse.php that implements Filament's logout response contract and redirects users to the filament.guest.pages.portal-page route after logout.

Service Provider Registration:

• Created a new FilamentServiceProvider in app/Providers/FilamentServiceProvider.php that binds the Filament logout response contract to the custom LogoutResponse implementation.
• Registered the new FilamentServiceProvider in bootstrap/providers.php to ensure the binding is active in the application lifecycle.

Minor Blade Template Update:

• Changed the heredoc label from BLADE to HTML in the guest panel provider's renderHook call for clarity and consistency.