Writing InstrumentationModule line by line

[mateuszrzeszutek]

Resolves #2662
And resolves #536 -- after this is merged all questions/tasks will have been solved or have issues created for them.

[trask]

😻

I felt like some sub-section headings would help, it was not always clear when jumping from one topic to another, so I suggested some heading, but not sure if it's too much, very happy with whatever you decide, this doc is 💯

[mateuszrzeszutek]

I felt like some sub-section headings would help, it was not always clear when jumping from one topic to another, so I suggested some heading, but not sure if it's too much, very happy with whatever you decide, this doc is 💯

Those headings really make it look better, thanks!

[trask]

🥳