Add transcription factor track to demo instances

[cmdcolin]

Can use 2022 jaspar binding site dataset

http://hgdownload.soe.ucsc.edu/gbdb/hg38/jaspar/ https://genome.ucsc.edu/cgi-bin/hgTrackUi?db=hg38&g=jaspar https://jaspar.genereg.net/about/

It may be useful to have a specialized track type or track config to display it usefully

without extra config, pretty much everywhere on the genome has many binding sites

[cmdcolin]

could also be worth adding a visualization of long-range interactions with the arc view (we talk about our ability to do this often but a good demo with arc view would be great)

data from ncbi https://twitter.com/NCBI/status/1483865345609904133/photo/1

example file that can use arc view https://ftp.ncbi.nlm.nih.gov/refseq/FunctionalElements/trackhub/data/human/AR109.20201120/FEfeats_AR109.20201120.bb

[cmdcolin]

some recent work on a configurable filter added a score>400 filter which is how the JASPAR track is displayed by default on the UCSC website https://jbrowse.org/code/jb2/filter_branch/?config=https%3A%2F%2Fs3.amazonaws.com%2Fjbrowse.org%2Fdemos%2Fucsc%2Fconfig.json&session=share-S5GE4I2L5l&password=0QmC1