vendor raymenu dependencies

raymenu/vendor/github.com/ebitengine/purego/is_ios.go

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2022 The Ebitengine Authors
+
+//go:build !cgo
+
+package purego
+
+// if you are getting this error it means that you have
+// CGO_ENABLED=0 while trying to build for ios.
+// purego does not support this mode yet.
+// the fix is to set CGO_ENABLED=1 which will require
+// a C compiler.
+var _ = _PUREGO_REQUIRES_CGO_ON_IOS