refactor: Deref MainTrace type to ColMatrix

[iammadab]

Describe your changes

• Implement Deref for MainTrace to &ColMatrix
• Remove lifetime annotation from Maintrace
  • new method now takes in ColMatrix as opposed to &ColMatrix
• Replace &ColMatrix with &MainTrace

relevant issue: #1201

[plafer]

Looks great, thank you! Let a few minor nits.

Let's fix the CI too. You can fix by running locally:

// fix any clippy errors
$ cargo +nightly clippy --all -- -D clippy::all -D warning
// format once all fixes are done
$ cargo fmt

[plafer]

LGTM!

@bobbinth want to take a look before we merge?

[plafer]

@iammadab oops can you fix the CI? Basically an explicit import of Vec is needed for no_std (look at how other files do it)

[iammadab]

@plafer pushed no-std fix, we can run CI again.

[bobbinth]

Looks great! Thank you for working on this! I left one comment inline - but it could be as simple as adding a comment to the relevant method.

[plafer]

The clippy error is due to the latest nightly clippy (all branches have that error). I think we're good to merge this with the error, and fix it elsewhere (and only once).

[bobbinth]

All looks good! Thank you again!