Implement MarkDown parser and improve AbstractParser

src/Service/SnipParser/Markdown/MarkdownParser.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Service\SnipParser\Markdown;
+
+use App\Service\SnipParser\AbstractParser;
+use League\CommonMark\GithubFlavoredMarkdownConverter;
+
+class MarkdownParser extends AbstractParser
+{
+    public function safeParseView(string $content): string
+    {
+        $converter = new GithubFlavoredMarkdownConverter();
+        return $converter->convert($content);
+    }
+}