ci: add notice for external builds

.github/workflows/npm-publish-from-pr.yml

@@ -3,26 +3,19 @@ name: npm publish from PR
 on:
   workflow_dispatch:
     inputs:
-#      source:
-#        description: 'source ref: `google/zx/main/0cba...f9`'
       repo:
         description: 'source gh repo, like `google/zx`'
-#      branch:
-#        description: 'target branch'
       commit:
         description: 'commit id'
-#      cmd:
-#        description: 'build cmd'
-#        default: 'npm ci && npm run build'
 
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - name: Use Node.js 23
+      - name: Use Node.js 22
         uses: actions/setup-node@v4
         with:
-          node-version: 23
+          node-version: 22
 
       - name: Checkout
         uses: actions/checkout@v4
@@ -67,5 +60,8 @@ jobs:
           NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
 
       - run: |
+          node -e "const fs = require('fs'); fs.writeFileSync('./README.md', process.env.NOTICE + fs.readFileSync('./README.md'))"
           npm version $(node --eval="process.stdout.write(require('./package.json').version)")-pr.${{ github.run_id }} --no-git-tag-version
           npm publish --provenance --access=public --no-git-tag-version --tag pr
+        env:
+          NOTICE: "> ⚠<fe0f> **This snapshot was built from the external source**  \n> repo: ${{ github.event.inputs.repo }}  \n> commit: ${{ github.event.inputs.commit }}\n"

package.json

@@ -48,8 +48,7 @@
     "test:unit": "c8 -r lcov -r text -o target/coverage -x src/scripts -x src/test -x target node --loader ts-node/esm --experimental-specifier-resolution=node src/scripts/test.mjs",
     "test:smoke:esm": "node ./src/test/smoke/invoke.test.mjs",
     "test:smoke:cjs": "node src/test/smoke/invoke.test.cjs",
-    "publish:draft": "npm run build && npm publish --no-git-tag-version",
-    "manual:test:build-from-remote": "NODE_OPTIONS='--experimental-strip-types' npx zx@latest ./src/scripts/build-from-remote.mts --mode=test"
+    "publish:draft": "npm run build && npm publish --no-git-tag-version"
   },
   "repository": {
     "type": "git",