deps: tools: add gomvpkg

[Kamil Samigullin]

Motivation: it allows to do refactoring.

$  gomvpkg -from <path>  -to <path>

//go:build tools

package tools

import (
	_ "golang.org/x/tools/cmd/gomvpkg"
)

//go:generate go install golang.org/x/tools/cmd/gomvpkg

[Kamil Samigullin]

moved to kamilsk/dotfiles/issues/364