[ new ] Seq and BoundedQueue

[Matthew-Mosior]

This PR adds BoundedQueue, which is like Queue, but has a bounded size.

Additionally, since Seq (unsized) is utilitzed to implement BoundedQueue, Data.Seq.Internal, Data.Seq.Sized, and Data.Seq.Unsized have been migrated from contrib into this PR.

[Matthew-Mosior]

@stefan-hoeck

This should be ready for you to review when you have time.

[stefan-hoeck]

Could you please split this into two separate PRs: One for the bounded queue and one for Seq? Also, we need to add tests to this library. I'll try and setup a some tests for the containers I wrote by the end of the week. Would be greate if you could then add similar tests (and additional ones - as needed) for your own.

[Matthew-Mosior]

Could you please split this into two separate PRs: One for the bounded queue and one for Seq? Also, we need to add tests to this library. I'll try and setup a some tests for the containers I wrote by the end of the week. Would be greate if you could then add similar tests (and additional ones - as needed) for your own.

Yep, I can split these into two PRs. Adding tests after sounds good.