Trace to events

[Modularius]

Closes #49

[DanNixon]

Is there no way this PR can be split up? 7k lines is way too big for a single PR.

[Modularius]

Yes, I can submit the trace-to-pulses crate separately.

[DanNixon]

A few things that would form a starting point of making this more reviewable:

• Move the code from the trace-to-pulses crate into trace-to-events (the former is just support code for the latter, so I see no real reason for the extra crate)
• Change the visibility modifiers from pub to pub (crate) (the compiler will then issue a warning when you have code that is not actually used)
• The unused code can then be removed (this is not to say that it is not valuable, just that it does not yet belong on main and would be better kept in a branch until it is required)

[DanNixon]

Yes, I can submit the trace-to-pulses crate separately.

That will not really help, that crate is the vast majority of the code in this PR.

[DanNixon]

An initial look over. There are more places with style issues that I did not comment on.