Add ManifestDoesNotExistException and Solution (#4455)

Co-authored-by: Matthew Penner <matthew@pterodactyl.io>

app/Exceptions/ManifestDoesNotExistException.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace Pterodactyl\Exceptions;
+
+use Exception;
+use Spatie\Ignition\Contracts\Solution;
+use Spatie\Ignition\Contracts\ProvidesSolution;
+
+class ManifestDoesNotExistException extends Exception implements ProvidesSolution
+{
+    public function getSolution(): Solution
+    {
+        return new Solutions\ManifestDoesNotExistSolution();
+    }
+}

app/Exceptions/Solutions/ManifestDoesNotExistSolution.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Pterodactyl\Exceptions\Solutions;
+
+use Spatie\Ignition\Contracts\Solution;
+
+class ManifestDoesNotExistSolution implements Solution
+{
+    public function getSolutionTitle(): string
+    {
+        return "The manifest.json file hasn't been generated yet";
+    }
+
+    public function getSolutionDescription(): string
+    {
+        return 'Run yarn run build:production to build the frontend first.';
+    }
+
+    public function getDocumentationLinks(): array
+    {
+        return [
+            'Docs' => 'https://github.com/pterodactyl/panel/blob/develop/package.json',
+        ];
+    }
+}