Add (example/test) Go module

[AndrewSisley]

Add an example Go module to the project.

Might be worth parking this for a little while and using a different second language as tiny-go doesnt yet support pure wasm, and forces the import of a whole bunch of extra junk that we dont want:

tinygo-org/tinygo#1383
tinygo-org/tinygo#3068
is a draft PR to allow this tinygo-org/tinygo#3072

Is a wip branch where I ran into this issue here (in case I park this): sisley/feat/I3-test-go-module