[11.x] Feauture / Convert Number To A Stringable Format

[rmunate]

Hello,

This PR proposes that the spell and spellOrdinal methods, which are already understood to return a string, should directly return a Stringable instance. This would make it easier to manipulate the result by allowing direct use of the methods provided by the Illuminate\Support\Stringable class.

Examples:

Number::spell(10, 'es')->upper();  
Number::spell(10, 'es')->mask('*', 1, 2); // Result: "d**z"

This way, we avoid having to wrap the result manually, as in the following example:

new Stringable(Number::spell(10, 'es'));

This simplifies the workflow and enhances the developer experience. 😊

[rodrigopedra]

As this is a breaking change (even the tests needed to be changed), this should be sent to the master branch.

[taylorotwell]

Thanks for your pull request to Laravel!

Unfortunately, I'm going to delay merging this code for now. To preserve our ability to adequately maintain the framework, we need to be very careful regarding the amount of code we include.

If applicable, please consider releasing your code as a package so that the community can still take advantage of your contributions!