Add Rails webhook engine, docs, and dependency refresh

spec/spec_helper.rb

@@ -8,9 +8,16 @@ end
 
 require "yookassa"
 require "webmock/rspec"
+WebMock.disable_net_connect!(allow_localhost: true)
+
+Dir[File.expand_path("support/**/*.rb", __dir__)].sort.each { |file| require file }
 
 RSpec.configure do |config|
   config.order = :random
   config.filter_run focus: true
   config.run_all_when_everything_filtered = true
+
+  config.before do
+    WebMock.reset!
+  end
 end