Migrate tests to run on github actions (#136)

Connected to gramo-org/echo#7501

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: Tests
+
+on:
+  workflow_dispatch:
+  pull_request:
+    types: [opened, reopened, synchronize]
+  push:
+    branches: [master]
+
+concurrency:
+  group: ${{ github.head_ref || github.ref_name }}
+  cancel-in-progress: true
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        ref: ${{ github.event.pull_request.head.sha || github.ref_name }}
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: '3.1.3'
+        bundler-cache: true
+
+    - name: Run tests
+      run: bundle exec rspec