Decouple the generated packages

[jodinathan]

Today the Typings package is huge because it bundles all lib bindings with it.

We could decouple them buy introducing some way for the dev to choose the libs it needs while also adding the option to choose the version.

Maybe something like this:

Consider the file typings.dart

@mt.MakeTypings([
  mt.AnimeJS(),
  mt.Deno(version: '1.2.3')
])
library foo;

import 'package:typings/make_typings.dart' as mt;

Then it would generate the bindings in the .dart_tool folder:
typings.animejs.dart, typings.deno.dart

Pretty much like AngularDart does with its templates.

Please let me know if you have any ideas

[leandroveronezi]

Good idea,

First, I think it would be interesting to separate ts2dart from typings. Make it so that anyone can run ts2dart via the command line, generating the file in dart. The idea of having to clone the typings repository to be able to generate the library does not seem like a pleasant thing.