Pharo extension methods: tutorial

[glennj]

FYI @Bajger

“How to create an extension method” has come up a few times in mentoring, so I wrote up a brief tutorial about it with screenshots: Pharo | glennj’s github pages

Is this worth adding, or linking to, in the Pharo track docs, or as an instructions.append.md file for exercises that require it?

[BethanyG]

I think both. A general track doc for reference, and then instruction appends that point to the doc when needed?

[Bajger]

I’ll try to incorporate tutorial in instruction appends and in track docs.