Prepare Chrome extension deploy

[MartinGroscheTT]

Description

As the extension maintainer we want to have a fully automated deploy to the Chrome Store.

Acceptance Criteria

• The extension build process is integrated in the CI pipeline (e.g. GitHub Actions)
• The version number and metadata are updated as part of the workflow
• A valid ZIP package is created for Chrome Web Store submission
• The workflow uses the Chrome Web Store API to authenticate and upload the new version
• OAuth credentials and other secrets are stored securely (e.g. GitHub Secrets)
• The deployment is triggered on new tag or release in the repository
• The process includes a step to publish the submitted version
• Deployment steps and configuration are documented
• The workflow is successfully tested with a test extension or dry-run mode, if available