Add support for RailsLiveReload

Automatically reloads the dummy app (or any other app that has
`rails_live_reload`gem installed) if changes to Alchemy files have
been made.

Gemfile

@@ -57,3 +57,5 @@ if Gem.ruby_version >= Gem::Version.new("3.1.0")
 end
 
 gem "web-console", "~> 4.2", group: :development
+
+gem "rails_live_reload", "~> 0.3.5"

config/initializers/rails_live_reload.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+if defined?(RailsLiveReload)
+  RailsLiveReload.configure do |config|
+    # Default watched folders & files
+    config.watch %r{app/views/.+\.(erb)$}
+    config.watch %r{(app|vendor)/(assets|javascript)/\w+/(.+\.(s?css|coffee|js|html|png|jpg)).*}, reload: :always
+
+    # More examples:
+    config.watch %r{app/(helpers|components|decorators)/.+\.rb}, reload: :always
+    config.watch %r{config/locales/.+\.yml}, reload: :always
+  end
+end

lib/alchemy/dev_support/live_reload_watcher.rb

@@ -0,0 +1,5 @@
+module Alchemy
+  class LiveReloadWatcher < RailsLiveReload::Watcher
+    def root = Alchemy::Engine.root
+  end
+end

lib/alchemy/engine.rb

@@ -59,6 +59,12 @@ class Engine < Rails::Engine
           Alchemy.user_class.stampable(stamper_class_name: Alchemy.user_class.name)
         end
       end
+
+      if defined?(RailsLiveReload) && Rails.env.development?
+        require "alchemy/dev_support/live_reload_watcher"
+
+        Alchemy::LiveReloadWatcher.init
+      end
     end
 
     initializer "alchemy.webp-mime_type" do