Replace post, get declarations with resources
This commit refactors the Request Routing layer of our application by
combining our separate post and get route declarations into a single
resources :notes call.
The resources route helper will generate Rails seven conventional
actions. Our application currently depends on only two of those actions:
new and create.
By invoking resources with the only: [:new, :create] option,
the application will exclude all action routes except for #new and
#create.
After making this change and running the tests again, the suite still passes.