Add new block without any hard coding

Hi @artf ,

We are gonna to embed this grapes editor into our portal as an Email editor. As the Email will be sent by the batch process to customers, merge tags will be implemented in order to replace the variables in the template by the actual values such as names, ages, addresses of the customers. At the moment, the merge tags are hardcoded in the code with the approach in https://github.com/artf/grapesjs/issues/481. Because the end users of the editor are non-technical people and as the business is growing more templates will be created with new variables (merge tags), we need to make the merge tags can be added from a button on the panel and then save the added tags to a config file or DB.

Is there any approach to achieve such sort of requirement?

One more question is that is it possible to load the blocks from a JSON/config file? Thank you very much!