Add release workflow

.github/workflows/go.yml

@@ -60,11 +60,6 @@ jobs:
       - name: Set CGO_ENABLED
         run: echo "CGO_ENABLED=${{ matrix.cgo }}" >> $GITHUB_ENV
 
-      - name: golangci-lint
-        uses: golangci/golangci-lint-action@v3
-        with:
-          version: latest
-
       - name: Test
         if: runner.os != 'Windows'
         run:  .ci/scripts/test.sh

.github/workflows/release.yml

@@ -0,0 +1,42 @@
+name: release
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: Tag name (e.g. v1.2.3) for this version (does not need to exist).
+        required: true
+        type: string
+      last_release:
+        description: Last release tag.
+        required: true
+        type: string
+
+permissions:
+  contents: read
+
+jobs:
+  draft:
+    permissions:
+      contents: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        ref: main
+        fetch-depth: 0 # Need full history.
+
+      - name: release notes
+        run: >-
+          go run github.com/hashicorp/go-changelog/cmd/changelog-build@ba40b3a
+            -changelog-template .ci/release/changelog.gotmpl
+            -entries-dir ./.changelog
+            -note-template .ci/release/release-note.gotmpl
+            -last-release "${{ inputs.last_release }}"
+            -this-release HEAD | tee /tmp/release-notes.txt
+
+      - name: draft GH release
+        run: >-
+          gh release create "${{ inputs.version }}"
+            --draft
+            --notes-file /tmp/release-notes.txt
+            --title "${{ inputs.version }}"