Anonymous entrypoints

[rbalicki2]

We need "anonymous entrypoints" because:

• multiple different entrypoint declarations of the same client field can have different @lazyLoad values. We just kind of paper over that right now
• we may want to pass some hard coded variables, like entrypoint Query.Blog(showDetails: true). Omitted variables, like id, would still be required to be passed
• it's nice to just have query { Blog(id: 1) } instead of defining a wrapper component.

But wait! Only the last is anonymous! The rest have names. Anonymous here means that the location of the generated entrypoint file cannot be type/fieldName/entrypoint.ts.