feat(golangci): add linter and action to run golangci-lint

Currently running with the default config.

Author: nobe4

.github/workflows/golangci-lint.yml

@@ -0,0 +1,27 @@
+name: golangci-lint
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  golangci-lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+          cache: true
+
+      - name: Launch golangci-lint
+        uses: golangci/golangci-lint-action@v6

script/lint

@@ -3,3 +3,5 @@
 set -e
 
 go fmt ./...
+go mod tidy
+golangci-lint run --fix