Vendor dependencies

Let's see how I like this workflow.

vendor/cxx/tools/buck/prelude/apple/apple_resource.bzl

@@ -0,0 +1,29 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+
+load(":apple_resource_types.bzl", "AppleResourceDestination", "AppleResourceSpec")
+load(":resource_groups.bzl", "create_resource_graph")
+
+def apple_resource_impl(ctx: "context") -> ["provider"]:
+    destination = ctx.attrs.destination or "resources"
+    resource_spec = AppleResourceSpec(
+        files = ctx.attrs.files,
+        dirs = ctx.attrs.dirs,
+        content_dirs = ctx.attrs.content_dirs,
+        destination = AppleResourceDestination(destination),
+        variant_files = ctx.attrs.variants or [],
+        named_variant_files = ctx.attrs.named_variants or {},
+        codesign_files_on_copy = ctx.attrs.codesign_on_copy,
+    )
+    graph = create_resource_graph(
+        ctx = ctx,
+        labels = ctx.attrs.labels,
+        deps = [],
+        exported_deps = [],
+        resource_spec = resource_spec,
+    )
+    return [DefaultInfo(), graph]