Results 3 issues of Giuliano Mega

Added the info @dryajov provided me on Discord about top-level structure. Suppose it might be useful for newcomers or casual perusers.

### Description While tracking down a bug, I have accidentally bumped into some funny behavior with sink parameters while using refc: namely, that the locations passed to sink parameters are...

Showstopper
Regression
ARC/ORC Memory Management

I've recently bumped into [an issue that affects how `sink` parameters behave in refc](https://github.com/nim-lang/Nim/issues/23354) and which can have adverse effects on Chronos' (V4) futures: `sink` parameters can end up being...