Add Fastlane and GitHub Actions for CI

.github/workflows/main.yml

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+name: Build
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: macos-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Set up Ruby and Bundler
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: '2.7' # Specify a Ruby version compatible with Fastlane and your project
+        bundler-cache: true # Automatically runs bundle install and caches gems
+
+    - name: Build with Fastlane
+      run: bundle exec fastlane build

Gemfile

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+source "https://rubygems.org"
+
+gem "fastlane"

fastlane/Fastfile

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+default_platform(:ios)
+
+platform :ios do
+  desc "Build the Spacequest app"
+  lane :build do
+    gym(scheme: "Spacequest", xcargs: "CODE_SIGN_IDENTITY='' CODE_SIGNING_REQUIRED=NO")
+  end
+end