Cleaning up scala-js-jquery for 2026

[ddworak]

This pull request makes several important updates to the project's build, CI/CD workflows, and Scala.js/jQuery bindings. The main goals are to modernize build tooling, improve CI reliability, and enhance type safety in the Scala.js jQuery facade.

Build and CI/CD Modernization:

• Upgraded all available dependencies.
• Replaced separate sbt-pgp and sbt-sonatype plugins with sbt-ci-release and added sbt-github-actions for streamlined release and workflow generation.

GitHub Actions Workflow Improvements:

• Regenerated .github/workflows/ci.yml using sbt-github-actions, improving matrix builds (multiple Java versions), build/test/publish separation, and artifact publishing via ci-release.
• Added .github/workflows/clean.yml for automated cleanup of GitHub Actions artifacts, reducing storage usage.

Scala.js jQuery Facade Improvements:

• Changed the types of scrollLeft and scrollTop methods in JQuery.scala from Int to Double to prevent runtime errors.
• Fixed the signature of the error callback in JQueryAjaxSettings.apply to accept three arguments (JQueryXHR, String, String), matching the jQuery API API discuss #31