Better technical documentation for API

[TheLarkInn]

Let's try and break up a way to make the new phases and hooks easier to understand.

Public API (for Tapable instance)
Public API for a plugin registered to an instance.

How each hook works
Explanation of evals in code
Description of Interceptors

[tirthbodawala]

@TheLarkInn Do we have a date for this or any reference material after the issue was created?

[lili21]

any updates? really hard to figure out the different between each hook.

[malcolm-kee]

I've created a simplified version of tapable so it's easier to understand the behavior for each hook: https://github.com/malcolm-kee/naive-tapable.

It's still a WIP as I have not implemented interceptor and object options, but should be good enough if you want to figure out what each hook do.