ci: add GitHub Actions workflow and codecov configuration

- Add check.yaml workflow for Go tests and vet
- Add .codecov.yml with coverage thresholds and PR comment settings

Author: jimyag

.codecov.yml

@@ -0,0 +1,30 @@
+codecov:
+  require_ci_to_pass: true
+
+coverage:
+  precision: 2
+  round: down
+  range: "40...100"
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 1%
+        informational: false
+    patch:
+      default:
+        target: auto
+        threshold: 1%
+        informational: false
+
+comment:
+  layout: "reach,diff,flags,tree"
+  behavior: default
+  require_changes: false
+  require_base: false
+  require_head: true
+
+ignore:
+  - "**/*_test.go"
+  - "**/examples/**"
+  - "**/testdata/**"

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+  - package-ecosystem: gomod
+    directory: /
+    schedule:
+      interval: weekly

.github/workflows/check.yaml

@@ -0,0 +1,33 @@
+name: Go
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 1
+
+      - name: Set up Go
+        uses: actions/setup-go@v6
+        with:
+          go-version: stable
+          cache-dependency-path: go.sum
+
+      - name: Run tests
+        run: GORACE=atexit_sleep_ms=0 go test -trimpath -failfast -race -cover -v -coverprofile=coverage.txt ./...
+
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v6
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+
+      - name: Run vet
+        run: go vet ./...