Is your feature request related to a problem? Please describe.

I am working with rather big genomes which cannot be indexed as a .bai and need .csi. While jbrowse automatically fetches index files when you load a .bam, it does not detect .csi files.

Describe the solution you'd like

When loading a alignment.bam, look for a alignment.bam.csi automatically.

Describe alternatives you've considered

I can explicitly load the .csi index, but it would save a few clicks and be a quality of life change if that wasn't necessary.

Additional context

I use JBrowse 2.17.0