New co-topics under each topic

[Trombo481]

Since I did it myself to structure out the notes there might be topics or co-topics missed out under a particular lesson. Tried my best to not leave out any.

If found to be missing or necessary new PR/MR may be created to contribute. Would mean a lot.
Cos'

The more YOU share the more YOU get

[ryyhan]

Hey! I would like to contribute to this repo. Can you please assign me this issue?

[Trombo481]

Done! @Jbediah