Also export comment converter Node APIs

[JoshuaKGoldberg]

🚀 Feature Request

Following #732 to add a Node API, the next step for angular-eslint/angular-eslint#173 will be to also convert inline tslint:disable comments for users.

Existing Behavior

The convertFileComments method is not exported as a standalone function via the Node API.

Change Proposal

Let's export it!

More specifically: let's export an equivalent to it that takes in a file's content and path, and returns the new equivalent.