Add golangci-lint Github Action formatter and lint checks

.github/workflows/golangci-lint.yml

@@ -0,0 +1,25 @@
+name: golangci-lint
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+permissions:
+  contents: read
+  # Optional: allow read access to pull request. Use with `only-new-issues` option.
+  # pull-requests: read
+
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: stable
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v7
+        with:
+          version: v2.0

.golangci.yml

@@ -0,0 +1,35 @@
+version: "2"
+linters:
+  disable:
+    - errcheck      # TODO(rsned): Enable once outstanding lint bugs are fixed.
+    - mnd
+    - paralleltest
+    - staticcheck   # TODO(rsned): Enable once outstanding lint bugs are fixed.
+    - testpackage
+    - unused
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
+formatters:
+  enable:
+    - gofmt
+    - goimports
+  settings:
+    gofmt:
+      # Simplify code: gofmt with `-s` option.
+      # Default: true
+      simplify: false
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$