chore: deprecate circleci

[dkoo]

Same as Automattic/newspack-plugin#4413

[Copilot]

Pull request overview

This PR migrates CI/CD from CircleCI to GitHub Actions, deprecating the CircleCI configuration. It adds new GitHub Actions workflows for build, test, release, internationalization, and distributable creation, while removing the CircleCI configuration files.

Changes:

• Removed CircleCI configuration files (.circleci/config.yml and .circleci/dependabot.yml)
• Added GitHub Actions workflows for PHP testing, build/test, release, i18n, and distributable builds
• Updated package-lock.json to reference a specific git commit of newspack-scripts

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
.circleci/config.yml	Removed CircleCI workflow configuration
.circleci/dependabot.yml	Removed Dependabot configuration (was in incorrect directory)
.github/workflows/release.yml	Added GitHub Actions release workflow for release branches
.github/workflows/php.yml	Added GitHub Actions workflow for PHP linting and testing
.github/workflows/i18n.yml	Added GitHub Actions workflow for internationalization
.github/workflows/build-distributable.yml	Added GitHub Actions workflow for building distributable archives
.github/workflows/build-and-test.yml	Added GitHub Actions workflow for building and linting JS/SCSS
package-lock.json	Updated newspack-scripts reference to git commit instead of npm version

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[rbcorrales]

A few notes. Also, please check this other PR against this branch: #298

[github-actions]

🎉 This PR is included in version 2.8.1-alpha.1 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀

[github-actions]

🎉 This PR is included in version 2.8.1 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀