Add METAR interface and use local library for decoding

app/Interfaces/Metar.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Interfaces;
+
+abstract class Metar
+{
+    /**
+     * Implement the METAR- Return the string
+     * @param $icao
+     * @return mixed
+     */
+    abstract public function get($icao);
+}