Add CI workflow for tests and linter

Author: veganstraightedge

.github/workflows/ruby.yml

@@ -0,0 +1,29 @@
+name: Tests and linter
+
+on:
+  push:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version: ['3.4', '4.0']
+
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby-version }}
+          bundler-cache: true
+      
+      - name: Run tests
+        run: bundle exec rspec
+      
+      - name: Run Linter
+        run: bundle exec rubocop