Add SQUIRLS in silico splice annotations

[anneodonnell]

Interpretable prioritization of splice variants in diagnostic next-generation sequencing (2021)

PMID: 34289339

Pre-computed files: https://squirls.readthedocs.io/en/latest/setup.html
Script for offline scoring: https://squirls.readthedocs.io/en/latest/running.html
Pre-compiled software version: https://github.com/TheJacksonLaboratory/Squirls/releases

More info compiled by Ikeoluwa: https://docs.google.com/document/d/1AuNvgkQGxBkwpr6Fma2D3Tai2wMbsBtL5HFGEYH63qQ/edit?usp=sharing

[lynnpais]

Extraordinarily high amount of SE work. Decided not to implement for now.

[bpblanken]

@lynnpais some of the SV work we're doing will make this much easier. We can do this in 1-2 days of work now if we'd like to reconsider.

[lynnpais]

Do it around time of the SV work

[lynnpais]

Blocked on migrating Airflow to Luigi