[10.x] Add syntax sugar to the Process::pipe method

[WendellAdriel]

What changes

This adds a syntax sugar for the Process::pipe, allowing it to run simple commands without configuration like this:

$result = Process::pipe([
    'cat test',
    'grep -i "foo"',
]);

$result->output(); // "foo"

Taking into consideration that the content of test.txt will be:

Hello, world
foo

Why

This idea was shared by @nunomaduro on Twitter: https://twitter.com/enunomaduro/status/1645805234151895041 and I think this can be a simple way to run a pipeline of simple commands when we don't need to configure the commands to run.

Implementation Details

I thought about creating a SimplePipe class to not reuse the Pipe class for this, but IDK if that's a good idea. I'd love to get feedback and update the PR if needed.

[WendellAdriel]

Thanks, @nunomaduro and @taylorotwell.
That makes much more sense.

[taylorotwell]

I updated it. @WendellAdriel

[WendellAdriel]

Oh, just saw the changes now
I was going to do it, but thanks for helping me on this, @taylorotwell! You rock!!! 🤘