Sign in modal

[adrienpoly]

add remote modal for sign in

• adds a new modal component
• adds a new remote modal controller Concern

to open a page in a remote modal update the turbo frame target

<%= link_to sign_in_path(redirect_to: request.fullpath), data: {turbo_frame: "modal"} do %>

add the concern to the controller

class SessionsController < ApplicationController
  include RemoteModal
  allowed_remote_modal_actions :new
  ...
end