Added run_command() function and RunCommandFailedException exception

src/Cli/Exceptions/RunCommandFailedException.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace pointybeard\Helpers\Functions\Cli\Exceptions;
+
+use pointybeard\Helpers\Exceptions\ReadableTrace;
+
+class RunCommandFailedException extends ReadableTrace\ReadableTraceException
+{
+    private $command;
+    private $error;
+
+    public function __construct(string $command, string $error, int $code = 0, \Exception $previous = null)
+    {
+        $this->command = $command;
+        $this->error = $error;
+        parent::__construct("Failed to run command. Returned: {$error}", $code, $previous);
+    }
+
+    public function getCommand(): string
+    {
+        return $this->command;
+    }
+
+    public function getError(): string
+    {
+        return $this->error;
+    }
+}