Create packages engine writter

[avelino]

(improt "time")
(print (time.Now()))

On example time is stdlib but it's not in the main repository[1], It would have an own repository (example[2]). The build process (for VM distribution) is including all of stdlib packages, opening possibility of generating a virtual machine with self contained libraries (compiled).

Packages should be written in Go not in Rum (Initially, we will support packages written in Rum in the future)

[1] https://github.com/rumlang/rum [2] https://github.com/rumlang/time