Migrate index.ts to typescript

`index.js` is now generated form `index.ts`, and the javascript files
are stored in the `src/` folder.

Issue: HD-4097

Author: francoisferrand

.gitattributes

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+**.d.ts linguist-generated=true
+**.js linguist-generated=true

index.ts

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+export * as hdcontroller from './src/hdcontroller';
+export * as shuffle from './src/shuffle';