fix: Repeat Directive's Type Signature is incorrect

[nicholasrice]

🐛 Bug Report

It appears the type signature for the repeat directive is incorrect. Specifically, the acceptance of Expression<TSource, TArray, ExecutionContext<TSource>> types. This type expression forces the context.parent property of the expression binding to be of type ExecutionContext<TSource>, which is inaccurate. See a repro below, along with the difference in type signatures between the when directive and the repeat directive.

It's also worth noting that in the when directive, the context.parent property is of type any, which isn't accurate. @EisenbergEffect I recall you saying these types get messy quickly and getting everything to flow through properly was very tricky, any idea what is going on here? I'm noticing that CaptureType doesn't accept a type param for TParent, and that many directives don't capture that information - should they?

💻 Repro or Code Sample

https://stackblitz.com/edit/typescript-vcy276?file=index.ts