Create action to run Bank tests

.github/workflows/banking.yml

@@ -0,0 +1,23 @@
+name: Funds transfer tests
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Ruby 
+      uses: ruby/setup-ruby@55283cc23133118229fd3f97f9336ee23a179fcf
+      with:
+        bundler-cache: true
+    - name: Run tests
+      run: rspec