Add TypeScript type declaration

[antonilol]

fixes #123

https://github.com/Automattic/cli-table/issues/123#issuecomment-1238611029

this is the same file as i submitted to dt but without dt's header

Description

this pr adds ts types

Checklist

Please make sure the items below have been covered before requesting a review:

• [x] This change works and has been tested locally (or has an appropriate fallback).
• [ ] This change has relevant unit tests.
• [ ] This change has relevant documentation additions / updates (if applicable).

Deploy Notes

Notes regarding deployment of this PR, if any.

Steps to Test or Reproduce

use this in typescript and try to put in other types