Remove the need for polyfill (e.g. path) on serverless workflow core packages:

• serverless-workflow-combined-editor
• serverless-workflow-text-editor
• serverless-workflow-language-service 
• serverless-workflow-service-catalog

There is no need to use polyfill on these packages since the editor's code runs on the client side entirely. This is beneficial for applications that run the editor but disables polyfill.