Add google form input UI to index.html

[colleenm]

Currently the only way to run tttc on a dataset pulled from google sheets is to clone the repo, run the dev server, and then run the googlesheet script.

We should augment the current index.html report creation UI to take all the necessary fields for using a google sheet, instead of a CSV upload. See the CONFIG object in the googlesheet script above for the set of fields necessary for google sheet input.

[colleenm]

Low priority but I'd like it in our backlog