Move exceptions to own folder

src/Exception/ColourNotFound.php

@@ -0,0 +1,8 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pcm\IconBundle\Exception;
+
+class ColourNotFound extends \Exception {};
+

src/Exception/IconNotFound.php

@@ -0,0 +1,7 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pcm\IconBundle\Exception;
+
+class IconNotFound extends \Exception {};