Update return type and type hints

[dcblogdev]

[solomon-ochepa]

There are a few bugs that require attention.

For instance, the property in src/Activators/FileActivator.php, along with several others, has been identified as having two data types, both of which are formatted incorrectly.

Actual:

    /**
     * Laravel Filesystem instance
     *
     * @var Filesystem
    */
    private mixed $files;

Correction:

    /**
     * Laravel Filesystem instance
    */
    private mixed $files;

Contrary to my previous interaction, not all properties and methods are of mixed types; rather, they each have a specific, precise type.

[solomon-ochepa]

I was hoping to assist with this; fortunately, you're already on it. The codebase requires some cleanup.

[dcblogdev]

Yeah this is very much a wip not everything is correct yet