Fire up a https://datasette.io instance with the "table" across the (sub)datasets

[yarikoptic]

The idea was triggered by a reviewer's comment to improve navigation/search across subdatasets (e.g. on different body parts etc), and @neurolabusc already developing a script to produce a table. I think that then it is very feasible and potentially very useful to provide web UI website over such a table to provide desired searching etc. I think it could be a lean instance running on github pages so we would just need to maintain CI to automatically re-export the table on updates.

[neurolabusc]

@yarikoptic feel free to implement. I have included Python scripts that allow users to search both DICOM and BIDS/JSON entries. The scripts are easily modified for refined searches, but a web interface would be elegant.