Remove ref in table syntax

[Huy-DNA]

Summary

• This syntax (ref in table) is no longer supported:

   Table A {
      id integer
      code integer
      Ref: id > code
   }

Issue

(issue link here)

Lasting Changes (Technical)

• Ref validator
• Table interpreter
• Element suggestion for table column (no longer suggest ref)

Checklist

Please check directly on the box once each of these are done

• Documentation (if necessary)
• Tests (integration test/unit test)
• Integration Tests Passed
• Code Review