[Feature Request] use ttypescript under the hood to enable applying TS transforms

https://www.npmjs.com/package/ttypescript

The main benefit of going with this solution is being able to specify transformer plugins in `tsconfig.json` so it's an easy configuration

Start by reviewing the linked ttypescript package and how this project currently reads tsconfig.json and invokes TypeScript during bundling. Determine the integration points for transformer plugins and define done as transformer plugins specified in tsconfig.json being applied successfully during builds.

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