Add Go package option

…into a separate stream (#5)

Co-authored-by: Alexey Sharp <alexeysharp@Alexeys-iMac.local>

git-subtree-dir: interfaces
git-subtree-mainline: e791b49
git-subtree-split: c6677a3

Co-authored-by: Alexey Sharp <alexeysharp@Alexeys-iMac.local>

git-subtree-dir: interfaces
git-subtree-mainline: 3e3e487
git-subtree-split: 50a3552