Generate collection specific query arguments

[bsouthga]

Currently, the arguments for methods like findAll are untyped, we could generate fully typed schema for the arguments of these methods. This would allow typechecking mongo query objects:

const user = Tyr.byName.user.findAll({
  query: {
     _id: userId, // <- this is fine, as there is an _id property on User,
     mame: 'ben' // <- this causes compiler error, as property 'mame' doesn't exist on user.
   }
});

[bsouthga]

closing as not currently possible until something like this gets in: microsoft/TypeScript#12424