Add GitHub Actions CI/CD pipelines

CI workflow runs tests (Ruby 3.3, 3.4, head), RuboCop, and gem build
on every push/PR to main. Release workflow auto-publishes to RubyGems
when a GitHub release is created.

Made-with: Cursor

Author: MrCesar107

.github/workflows/ci.yml

@@ -0,0 +1,55 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    name: Test (Ruby ${{ matrix.ruby }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: ["3.3", "3.4"]
+        include:
+          - ruby: head
+            experimental: true
+    continue-on-error: ${{ matrix.experimental || false }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Run tests
+        run: bundle exec rake test
+
+  lint:
+    name: RuboCop
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler-cache: true
+      - name: Run RuboCop
+        run: bundle exec rake rubocop
+
+  build:
+    name: Build Gem
+    runs-on: ubuntu-latest
+    needs: [test, lint]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler-cache: true
+      - name: Build gem
+        run: gem build ruby_code.gemspec
+      - name: Verify gem was built
+        run: ls ruby_code-*.gem

.github/workflows/release.yml

@@ -0,0 +1,25 @@
+name: Release
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  publish:
+    name: Publish to RubyGems
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler-cache: true
+      - name: Build gem
+        run: gem build ruby_code.gemspec
+      - name: Push to RubyGems
+        run: gem push ruby_code-*.gem
+        env:
+          GEM_HOST_API_KEY: ${{ secrets.RUBYGEMS_API_KEY }}