*: revendor and regenerate protobuf files

vendor/golang.org/x/text/doc.go

@@ -0,0 +1,13 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:generate go run gen.go
+
+// text is a repository of text-related packages related to internationalization
+// (i18n) and localization (l10n), such as character encodings, text
+// transformations, and locale-specific text handling.
+package text
+
+// TODO: more documentation on general concepts, such as Transformers, use
+// of normalization, etc.