[8.x] Allow users to specify configuration keys to be used for primitive binding

[simensen]

Syntactic sugar around fancy calls to ->give() related to getting primitives from configuration.

Most of the time when I'm doing primitive binding it is for the purpose of using configuration values as constructor arguments. A lot of function calls are used and feel pretty bulky compared to being able to just say, "hey, get the value from this config key."

This PR provides the ability to do just that. Need an API key? ->need('$apiKey')->giveConfig('awesome_api.key') is all you'd need to set in a service provider now.

$container
    ->when(ContainerTestContextInjectFromConfigIndividualValues::class)
    ->needs('$username')
    ->giveConfig('test.username');

Is the same as:

$container
    ->when(ContainerTestContextInjectFromConfigIndividualValues::class)
    ->needs('$username')
    ->give(function () {
        return config('test.username');
    });

and

$container
    ->when(ContainerTestContextInjectFromConfigIndividualValues::class)
    ->needs('$username')
    ->give(fn() => config('test.username'));

---

I believe this may require additional work on the contract (?) that I'll do if this gets approved. Would just need to know which branch to target that change on. I can also do the docs on this if it looks like this will be able to be merged. :)

[GrahamCampbell]

bad cs

[matason]

Bad CS because the first line of the docblock should be wrapped?

[simensen]

My bad on this. My guess might be there are two spaces between string and $key instead of just one? Or maybe the long line. :) Either way, my bad. I had actually fixed a few other things that the styleci bot complained about and figured it was all good since it passed.

[matason]

@simensen I found this which says two spaces between @param and the type and then two spaces before the variable name so it could be that.