Add CI workflow for Go project

- Created a GitHub Actions CI workflow to automate testing on push and pull request events.
- Configured the workflow to run tests using Go, including dependency installation and race condition checks.
- Ensured the workflow triggers on changes to Go files, go.mod, go.sum, and the CI configuration itself.

Author: aws-gopher

.github/workflows/ci.yaml

@@ -0,0 +1,33 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+      - '**/*.go'
+      - 'go.mod'
+      - 'go.sum'
+      - '.github/workflows/ci.yaml'
+  pull_request:
+    branches: [ main ]
+    paths:
+      - '**/*.go'
+      - 'go.mod'
+      - 'go.sum'
+      - '.github/workflows/ci.yaml'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+          cache: true
+      - name: Install dependencies
+        run: |
+          go get .
+      - name: Run tests
+        run: go test -race -v ./...