add release workflow (#36)

.github/workflows/release.yml

@@ -0,0 +1,40 @@
+name: Release
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  publish-npm:
+    runs-on: ubuntu-latest
+    environment: npm
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-node@v3
+      with:
+        node-version: 20
+        registry-url: https://registry.npmjs.org/
+    - name: run tests
+      run: |
+        npm i -g @sap/cds-dk
+        npm i
+        npm run lint
+        npm run test
+    - name: get version
+      id: package-version
+      uses: martinbeentjes/npm-get-version-action@v1.2.3
+    - name: parse changelog
+      id: parse-changelog
+      uses: schwma/parse-changelog-action@v1.0.0
+      with:
+        version: '${{ steps.package-version.outputs.current-version }}'
+    - name: create a GitHub release
+      uses: ncipollo/release-action@v1
+      with:
+        tag: 'v${{ steps.package-version.outputs.current-version }}'
+        body: '${{ steps.parse-changelog.outputs.body }}'
+    - run: npm publish --access public
+      env:
+        NODE_AUTH_TOKEN: ${{secrets.npm_token}}