Back port DDL to JS

[leonpolak]

Is your feature request related to a problem? Please describe.
Considering all the great advantages of metaschemas as a single source of truth for db structure, data validation, and so on, I see a huge amount of manual labor in the migration of existing db structures to metarhia. While it should be a simple mechanical task with minimal manual revision afterward.

Describe the solution you'd like
I would like to have a DDL files parser. It should take a specified directory with sql (or a single DDL file) and output translated metashema files to the designated directory.

Additional context
I do know an expert in SQL parsers that I might ask for help, in case this issue seems actual.

[georgolden]

@leonpolak it would be super helpful, if you can provide SQL samples to work with. It will decrease time to implement this feature significantly. Simply, less time required to create samples by my side.