[5.8] Add Env class

[kawax]

laravel/ideas#1580

Still no breaking change.
This is for users who do not want to use env().

<?php

use Illuminate\Support\Env;

return [
    'name' => Env::get('APP_NAME', 'Laravel'),
];

future plan

• Replace all env()
• Deprecate env() and move to laravel/helpers

[jmarcher]

Why? What is the problem with env() ? Why would someone not use env() but somehow Env::get()?

[kawax]

env() is likely to conflict with other packages.
Same function, but a slightly different spec.

[taylorotwell]

Maybe for 5.9.

[mfn]

@kawax FWIW, I support your basic idea, thanks 👍

I personally have been bitten by this, integrating legacy code with Laravel which also used a env() global function which however worked differently 💥

[driesvints]

@mfn this got added on master: #28073