This issue is part 2/2 for setting up the new infrastructure for developing standalone plugins.

Requirements

This work should be implemented against a new feature/modules-to-plugins feature branch.

After #934 has been completed:

• The php-test-standalone-plugins.yml and deploy-standalone-plugins.yml workflows should be enhanced to also cover plugins found in the plugins directory (additionally to plugins in the modules directory, which need to be built first).
• Some key differences to look out for:
  • Plugins in the plugins folder can be assumed to truly be plugins (not modules). So they don't require a build process (at least not for now).
  • Modules still need to be built, the same way they are now.
  • In other words, the ready-to-deploy versions of modules continue to live in a folder within build, while plugins can be deployed directly from their folder within plugins.
• Both workflows should only act for plugins that are part of plugins.json.
• The npm run test-plugins command will likely need to be expanded to also cover plugins in the plugins folder (but only those that are in plugins.json).