api(application): relocate egg endpoints

app/Http/Requests/Api/Application/Eggs/GetEggRequest.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Pterodactyl\Http\Requests\Api\Application\Eggs;
+
+use Pterodactyl\Models\Egg;
+
+class GetEggRequest extends GetEggsRequest
+{
+    /**
+     * Determine if the requested egg exists on the Panel.
+     *
+     * @return bool
+     */
+    public function resourceExists(): bool
+    {
+        $egg = $this->route()->parameter('egg');
+
+        return $egg instanceof Egg && $egg->exists;
+    }
+}