Support CRAM Files

[tshauck]

No description provided.

[tshauck]

records looks to be the main way into the iterator... need to deal with the lifetimes somehow... https://github.com/zaeleus/noodles/blob/master/noodles-cram/examples/cram_view_async.rs

[tshauck]

I have a record stream... I think.

Otherwise, it looks like the CRAM record implements a SAM alignment record, so perhaps a first pass, see if we can reuse some of the SAM functionality in a similar way that it's that way for BAM.

[tshauck]

Almost there... big issue right now is that Repository isn't Sync meaning I cannot use it in FileOpener in its current state. 🤔