[4.x] Improve tenants:run command to execute Input\Output commands (#923)

* run command useable for questions asking commands

* move console classes to Console directory

* fix styling

* Update src/Commands/Run.php

Co-authored-by: Samuel Štancl <samuel@archte.ch>

* remove tenant migration line

* assert command executed in tenant context

* improve test

* cleanup code

* Update CommandsTest.php

* remove irrelevant assertions

Co-authored-by: Samuel Štancl <samuel@archte.ch>

tests/Etc/ExampleCommand.php

@@ -1,41 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Stancl\Tenancy\Tests\Etc;
-
-use Illuminate\Console\Command;
-
-class ExampleCommand extends Command
-{
-    /**
-     * The name and signature of the console command.
-     *
-     * @var string
-     */
-    protected $signature = 'foo {a} {--b=} {--c=}';
-
-    /**
-     * Execute the console command.
-     *
-     * @return mixed
-     */
-    public function handle()
-    {
-        User::create([
-            'id' => 999,
-            'name' => 'Test command',
-            'email' => 'test@command.com',
-            'password' => bcrypt('password'),
-        ]);
-
-        $this->line("User's name is " . User::find(999)->name);
-        $this->line($this->argument('a'));
-        $this->line($this->option('c'));
-    }
-}
-
-class User extends \Illuminate\Database\Eloquent\Model
-{
-    protected $guarded = [];
-}