Fix Turbo(links) integration

[cjdenio]

This PR fixes the currently-broken Turbolinks integration (breakage caused by this line) and replaces it with Turbo, Turbolinks's successor.

also see reactjs/react-rails#1103 (comment)

[maxwofford]

@cjdenio Excited for this! Just assign me as a reviewer once it's ready to check out

[maxwofford]

I can't get past the signin step. Try it out on the preview deploy.

[cjdenio]

@maxwofford should be all set now (hotwired/turbo-rails#12 (comment))

[maxwofford]

Screenrecording of me testing: https://youtu.be/e7_WBQwuLKI

[cjdenio]

Hmm, I'm pretty sure this is just Heroku's staging environment being oddly slow.

Turbo actually doesn't apply to certain pages with <% include_modals %> at the top; you'll notice here that the browser's just performing an ordinary page change.

Also, Turbo has its own cache that makes most route changes instantaneous; try switching between "Settings" and "Documentation" (also using the browser back/forward buttons) and it should be very fast.

[maxwofford]

Thanks for adding this! Let's go for it and see how it goes. Can you please rebase+merge? Please post in #bank-team once merged letting them know a large change in page loading has been merged and if they run into any issues of slower loading/links acting weird to post it immediately with you tagged.

[cjdenio]

Awesome! I'm not in #bank-team, so maybe you could merge + post?