ci: migrate to shared workflows (#1)

Replace the generic ci.yml jobs with the shared go-pr and go-release workflows.
Add autoupdate through shared go-autoupdate.
Keep golangci-lint in a separate lint.yaml, because the shared workflows do not run it.
Add a build-less .goreleaser.yaml so the shared release flow can tag and publish the library.

.github/workflows/lint.yaml

@@ -0,0 +1,28 @@
+name: Lint
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+concurrency:
+  group: lint-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  golangci-lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-go@v6
+        with:
+          go-version: ">=1.22"
+      - uses: golangci/golangci-lint-action@v7
+        with:
+          version: v2.9.0