fix: get publising working

[DNR500]

Summary

Fix CI publish of @RaspberryPiFoundation/scratch-gui to GitHub Packages by skipping npm lifecycle scripts during npm publish. The existing prepublishOnly hook blocks all publishes (including CI).

Problem

CI on code-classroom runs npm publish for @RaspberryPiFoundation/scratch-gui after a successful build. Publish fails because packages/scratch-gui defines a prepublishOnly script that always exits with code 1 to discourage manual publishes. npm runs that hook on every publish, including CI, so the job never uploads to GitHub Packages.

npm version in the same step succeeds; the failure happens when npm publish triggers prepublishOnly.

CI error

https://github.com/RaspberryPiFoundation/scratch-editor/actions/runs/26237618439/job/77215053999

Run RELEASE_VERSION="13.7.3-code-classroom.$(date +'%Y%m%d%H%M%S')"
  RELEASE_VERSION="13.7.3-code-classroom.$(date +'%Y%m%d%H%M%S')"
  npm version --no-git-tag-version "$RELEASE_VERSION"
  npm publish --access public --tag latest
  shell: /usr/bin/bash -e {0}
  env:
    NPM_CONFIG_USERCONFIG: /home/runner/work/_temp/.npmrc
    NODE_AUTH_TOKEN: XXXXX-XXXXX-XXXXX-XXXXX
    NPM_AUTH_TOKEN: ***
npm warn Unknown user config "always-auth". This will stop working in the next major version of npm. See `npm help npmrc` for supported config options.
@RaspberryPiFoundation/scratch-gui
v13.7.3-code-classroom.20260521160858

removed 1 package, and changed 1 package in 4s

516 packages are looking for funding
  run `npm fund` for details
npm warn Unknown user config "always-auth". This will stop working in the next major version of npm. See `npm help npmrc` for supported config options.

> @RaspberryPiFoundation/scratch-gui@13.7.3-code-classroom.20260521160858 prepublishOnly
> echo "Please publish through CI only." && exit 1

Please publish through CI only.
npm error code 1
npm error path /home/runner/work/scratch-editor/scratch-editor/packages/scratch-gui
npm error command failed
npm error command sh -c echo "Please publish through CI only." && exit 1
npm error A complete log of this run can be found in: /home/runner/.npm/_logs/2026-05-21T16_09_02_784Z-debug-0.log
Error: Process completed with exit code 1.

Solution

Add --ignore-scripts to the publish step in .github/workflows/ci.yml:

npm publish --access public --tag latest --ignore-scripts

Why this should work

• The monorepo build job already runs npm run build, so dist/ is present before publish. Skipping lifecycle scripts at publish time does not skip the build.
• prepublishOnly is intended to block local npm publish; npm does not distinguish CI from a developer machine. --ignore-scripts skips that hook so GPR publish can complete.
• Only the CI publish command changes; prepublishOnly in package.json still discourages manual publishes from a laptop.

Test plan

• Merge to code-classroom (or push this branch and merge via PR).
• Confirm CI Publish scratch-gui to GitHub Packages succeeds.
• Confirm a new version appears on GitHub Packages — scratch-gui as 13.7.3-code-classroom.<timestamp>.