Add turbo/hotwire, fix routing

Gemfile

Gemfile.lock

app/assets/config/manifest.js

app/controllers/assignments_controller.rb

app/controllers/conferences_controller.rb

app/controllers/sessions_controller.rb

app/helpers/assignments_helper.rb

app/javascript/application.js

app/javascript/controllers/application.js

app/javascript/controllers/hello_controller.js

app/javascript/controllers/index.js

app/models/assignment.rb

app/models/conference.rb

app/models/session.rb

app/views/assignments/index.html.erb

app/views/assignments/show.html.erb

app/views/conferences/show.html.erb

app/views/layouts/application.html.erb

app/views/sessions/show.html.erb

bin/importmap