Fix: Filters Registrar

[MGatner]

Instead of using the Filters.php solution to register an alias this library should use Registrar (compare to Shield).

[mdestafadilah]

Instead of using the Filters.php solution to register an alias this library should use Registrar (compare to Shield).

can you provide some examples?

[MGatner]

https://github.com/codeigniter4/shield/blob/develop/src/Config/Registrar.php