treewide: add tools.go for all go binaries
Without these we don't actually pin the versions inside our go.mod and future versions of gazelle won't create any repositories for them.
Change-Id: I6b3951a1a7c8ee3e73792dc556becc0828873074
Reviewed-on: https://review.monogon.dev/c/monogon/+/3227
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
Tested-by: Jenkins CI
diff --git a/build/proto_docs/tools.go b/build/proto_docs/tools.go
new file mode 100644
index 0000000..56130ea
--- /dev/null
+++ b/build/proto_docs/tools.go
@@ -0,0 +1,8 @@
+//go:build tools
+// +build tools
+
+package proto_docs
+
+import (
+ _ "github.com/pseudomuto/protoc-gen-doc/cmd/protoc-gen-doc"
+)