add initial workflow for tests

.github/workflows/rspec-tests.yml

@@ -0,0 +1,22 @@
+name: RSpec Tests
+run-name: ${{ github.actor }} is running rspec tests
+on: 
+  pull-request:
+  push:
+    branches: 'main'
+
+jobs:
+  run-specs:
+    runs-on: macos
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Set up ruby
+        uses: ruby/setup-ruby@ec02537da5712d66d4d50a0f33b7eb52773b5ed1
+        with:
+          ruby-version: '3.1'
+          bundler-cache: true
+
+      - name: Run specs
+        run: bundle exec rspec spec