Added GitHub Actions CI workflow and initial unit tests

- Added .github/workflows/go-test.yml for automated CI testing using GitHub Actions
- Implemented unit tests for:
  • utils/release.go (FetchLatestRelease)
  • routes/builds.go (buildsHandler)
  • routes/status.go (statusHandler)
- Ensured tests run with go test ./... -v -cover
- Included go vet and gofmt checks in the CI pipeline
- Improved project reliability and continuous integration setup

.github/workflows/go-test.yml

@@ -0,0 +1,31 @@
+name: Go CI - Tests
+
+on:
+  push:
+    branches: [ main, master, dev ]
+  pull_request:
+    branches: [ main, master, dev ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.25'
+
+      - name: Install dependencies
+        run: go mod download
+
+      - name: Run unit tests
+        run: go test ./... -v -cover
+
+      - name: Run vet & lint checks
+        run: |
+          go vet ./...
+          test -z "$(gofmt -l .)"