Move npm publishing into build-and-publish #2218

[rymsha]

Folds npm publishing into the shared build-and-publish action via npmPublish (enonic/release-tools#69), gated on build-and-publish.outputs.release.

• build job: pass npmPublish: true.
• Removed the Upload npm package step and the entire npm-publish job (the upload/download artifact shuffle only existed to move build/types between jobs).
• Kept the GitHub release@master job.

Note: build/types is produced by the Gradle build (jar.dependsOn npmBuild); npmPublish rebuilds it before publishing (accepted per option 2).

Merge order: land enonic/release-tools#69 first.

Closes #2218

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 22.85%. Comparing base (f976314) to head (628ae9f).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2219   +/-   ##
=======================================
  Coverage   22.85%   22.85%           
=======================================
  Files           1        1           
  Lines          35       35           
=======================================
  Hits            8        8           
  Misses         27       27           

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