Add helper for void cache

src/Discord/Helpers/VoidCache.php

@@ -0,0 +1,66 @@
+<?php
+
+/*
+ * This file is a part of the DiscordPHP project.
+ *
+ * Copyright (c) 2015-present David Cole <[email protected]>
+ *
+ * This file is subject to the MIT license that is bundled
+ * with this source code in the LICENSE.md file.
+ */
+
+namespace Discord\Helpers;
+
+use Psr\SimpleCache\CacheInterface;
+
+/**
+ * The cache that always be null/void
+ */
+class VoidCache implements CacheInterface
+{
+    public function get(string $key, mixed $default = null): mixed
+    {
+        return $default;
+    }
+
+    public function set(string $key, mixed $value, null|int|\DateInterval $ttl = null): bool
+    {
+        return true;
+    }
+
+    public function delete(string $key): bool
+    {
+        return true;
+    }
+
+    public function getMultiple(iterable $keys, mixed $default = null): iterable
+    {
+        $result = [];
+
+        foreach ($keys as $key) {
+            $result[$key] = $default;
+        }
+
+        return $result;
+    }
+
+    public function setMultiple(iterable $values, null|int|\DateInterval $ttl = null): bool
+    {
+        return true;
+    }
+
+    public function deleteMultiple(iterable $keys): bool
+    {
+        return true;
+    }
+
+    public function clear(): bool
+    {
+        return true;
+    }
+
+    public function has(string $key): bool
+    {
+        return false;
+    }
+}