add release workflow

.github/workflows/release.yml

@@ -0,0 +1,54 @@
+name: release
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+jobs:
+  create-release:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Generate release notes
+        id: release-notes
+        run: |
+          PREVIOUS_TAG=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo "")
+          if [ -z "$PREVIOUS_TAG" ]; then
+            # If no previous tag, get all commits since the beginning
+            CHANGELOG=$(git log --pretty=format:"- %s (%h)" --no-merges)
+          else
+            # Get commits since the previous tag
+            CHANGELOG=$(git log ${PREVIOUS_TAG}..HEAD --pretty=format:"- %s (%h)" --no-merges)
+          fi
+
+          NOTES="## Changes in ${{ github.ref_name }}
+
+          $CHANGELOG
+
+          ### Installation
+
+          Use this version in your workflows:
+
+          \`\`\`yaml
+          uses: replicatedhq/replicated-actions/ACTION_NAME@${{ github.ref_name }}
+          \`\`\`"
+
+          echo "notes<<EOF" >> $GITHUB_OUTPUT
+          echo "$NOTES" >> $GITHUB_OUTPUT
+          echo "EOF" >> $GITHUB_OUTPUT
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v1
+        with:
+          tag_name: ${{ github.ref_name }}
+          name: Release ${{ github.ref_name }}
+          body: ${{ steps.release-notes.outputs.notes }}
+          draft: false
+          prerelease: ${{ contains(github.ref_name, '-alpha') || contains(github.ref_name, '-beta') || contains(github.ref_name, '-rc') }}
+