Add support for transcript variant normalization

[ahwagner]

Feature description

In our clinical variation landscape paper, we reportedly do not normalize c. ranged variants such as "VHL A56_P59del (c.166_178del)" because a genomic coordinate is not provided, but this is actually very achievable using UTA.

I think we should add support for this feature.

Use case

N/A

Proposed solution

No response

Alternatives considered

No response

Implementation details

No response

Potential Impact

No response

Additional context

No response

Contribution

None

[korikuzma]

@ahwagner could you provide some acceptance criteria? Are we going to start returning categorical variation? If not, what reference sequence would the variant be on?