Add GitHub Actions CI workflow for Go testing

- Add go-ci.yml workflow to run tests on push and PR
- Uses Go 1.24 as specified in go.mod
- Provides status check for branch protection requirements

Author: greysquirr3l

.github/workflows/go-ci.yml

@@ -0,0 +1,21 @@
+name: Go CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.24'
+      - name: Install dependencies
+        run: go mod download
+      - name: Run tests
+        run: go test ./...