ci: publish @aerokit/test to npm on release (#6324)

The generic Playwright runner for generated <name>.test manifests (npm/test) landed without a
publish step - the release publishes @dirigiblelabs/dirigible, dirigible-cli and @aerokit/sdk
only, so the package was unreachable from npmjs and consumers had to vendor it via a file:
dependency. Mirror the @aerokit/sdk steps: stamp the release version, npm publish --access
public from ./npm/test.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

Author: delchev

.github/workflows/release.yml

@@ -256,6 +256,18 @@ jobs:
 
       #--------------- Publish aerokit/sdk to NPM -----------------#
 
+      #--------------- Publish aerokit/test to NPM -----------------#
+
+      - name: (@aerokit/test) Set the new package version
+        working-directory: ./npm/test
+        run: npm version "${{ github.event.inputs.releaseVersion }}" --no-git-tag-version
+
+      - name: (@aerokit/test) Publish the package to npm
+        working-directory: ./npm/test
+        run: npm publish --access public
+
+      #--------------- Publish aerokit/test to NPM -----------------#
+
       - name: "Git: Push Changes"
         run: |
           git checkout -B ${{ github.event.inputs.releaseVersion }}