introduce specialized view for rails 8 authentication generator

lib/generators/tailwindcss/authentication/authentication_generator.rb

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+require "rails/generators/erb/authentication/authentication_generator"
+
+module Tailwindcss
+  module Generators
+    class AuthenticationGenerator < Erb::Generators::AuthenticationGenerator
+      source_root File.expand_path("templates", __dir__)
+    end
+  end
+end

lib/generators/tailwindcss/authentication/templates/views/sessions/new.html.erb

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+<div class="mx-auto md:w-2/3 w-full">
+  <h1 class="font-bold text-4xl">Sign in</h1>
+
+  <%% if alert = flash[:alert] %>
+    <p class="py-2 px-3 bg-red-50 mb-5 text-red-500 font-medium rounded-lg inline-block" id="alert"><%%= alert %></p>
+  <%% end %>
+
+  <%%= form_with url: session_url, class: "contents" do |form| %>
+    <div class="my-5">
+      <%%= form.email_field :email_address, required: true, autofocus: true, autocomplete: "username", placeholder: "Enter your email address", value: params[:email_address], class: "block shadow rounded-md border border-gray-400 outline-none px-3 py-2 mt-2 w-full" %>
+    </div>
+
+    <div class="my-5">
+      <%%= form.password_field :password, required: true, autocomplete: "current-password", placeholder: "Enter your password", maxlength: 72, class: "block shadow rounded-md border border-gray-400 outline-none px-3 py-2 mt-2 w-full" %>
+    </div>
+
+    <div class="inline">
+      <%%= form.submit "Sign in", class: "rounded-lg py-3 px-5 bg-blue-600 text-white inline-block font-medium cursor-pointer" %>
+    </div>
+  <%% end %>
+</div>
+

test/lib/generators/tailwindcss/authentication_generator_test.rb

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+require "test_helper"
+require "generators/tailwindcss/authentication/authentication_generator"
+
+class Tailwindcss::Generators::AuthenticationGeneratorTest < Rails::Generators::TestCase
+  tests Tailwindcss::Generators::AuthenticationGenerator
+  destination TAILWINDCSS_TEST_APP_ROOT
+
+  test "generates the new session template" do
+    run_generator
+
+    assert_file "app/views/sessions/new.html.erb"
+  end
+end