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/release.yaml

@@ -0,0 +1,24 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - "**.go"
+      - "go.mod"
+      - "go.sum"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  packages: write
+  id-token: write
+
+jobs:
+  release:
+    uses: lukaszraczylo/shared-actions/.github/workflows/go-release.yaml@main
+    with:
+      go-version: ">=1.22"
+      semver-config: ".semver.yaml"
+    secrets: inherit