add changesets action mock

Author: nicktrn

.github/workflows/release.yml

@@ -63,6 +63,7 @@ jobs:
         # PR is merged, the workflow will run again and this action will build +
         # publish to npm.
       - name: 🚀 PR / Publish
+        if: ${{ !env.ACT }}
         id: changesets
         uses: changesets/action@v1
         with:
@@ -75,6 +76,13 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
 
+      - name: 🚀 PR / Publish (mock)
+        if: ${{ env.ACT }}
+        id: changesets
+        run: |
+          echo "published=true" >> "$GITHUB_OUTPUT"
+          echo "publishedPackages=[{\"name\": \"@xx/xx\", \"version\": \"1.2.0\"}, {\"name\": \"@xx/xy\", \"version\": \"0.8.9\"}]" >> "$GITHUB_OUTPUT"
+
       - name: 📦 Get package version
         if: steps.changesets.outputs.published == 'true'
         id: get_version