Add tools package to track dependencies of tools (#425)

* go mod tidy

* Add tools for dependencies

Author: Noah Lee

Diff for: go.mod

@@ -80,6 +80,8 @@ require (
 	golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd // indirect
 	golang.org/x/sys v0.0.0-20220114195835-da31bd327af9 // indirect
 	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/tools v0.1.9-0.20211216111533-8d383106f7e7 // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/protobuf v1.26.0 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect