Yattee v2 rewrite

Gemfile

@@ -1,6 +1,20 @@
+# frozen_string_literal: true
+
 source "https://rubygems.org"
 
-gem 'fastlane'
+# Fastlane for build automation and distribution
+gem 'fastlane', '~> 2.225'
 
-plugins_path = File.join(File.dirname(__FILE__), 'fastlane', 'Pluginfile')
-eval_gemfile(plugins_path) if File.exist?(plugins_path)
+# Load environment variables from .env files
+# Note: fastlane requires dotenv < 3.0, so we use 2.x
+gem 'dotenv', '~> 2.8'
+
+group :test do
+  # RSpec for UI testing framework
+  gem 'rspec', '~> 3.13'
+  # Retry flaky UI tests automatically
+  gem 'rspec-retry', '~> 0.6'
+  # Code linting
+  gem 'rubocop', '~> 1.69', require: false
+  gem 'rubocop-rspec', '~> 3.3', require: false
+end