Allow typed injection in Kotlin without @JvmSuppressWildcards

[matejdro]

As per #900 (comment)

Most other Kotlin issues have been resolved (such as object modules requiring @JvmStatic). Is there any chance that this issue is solved too?

Workaround is pretty ugly, especially because it is pretty long and using it forces us to split declarations of injected types into multiple lines.

[Chang-Eric]

This is something on our list to address, but unfortunately we probably can't do full support in the sense of merging the key space for all parameterized keys due to the way it breaks backwards compatibility, complications with nested types, and complications with bidirectional support (e.g. intuitively we want to make Set<? extends Foo> and Set<Foo> be the same, but you can't actually assign a Set<? extends Foo> to a Set<Foo>.)

Our current plan is to improve the error message with a suggestion of the similar keys if they exist in the binding graph as well as probably doing the same thing as Guice did in google/guice#1366 to make this easier with multibindings.

[yschimke]

+1 to improving the error message, that would have saved me a lot of time.

[yschimke]

Also seems like a nice addition to https://dagger.dev/dev-guide/multibindings.html and any best practice docs.

[matejdro]

It looks like this will be solved as part of the KSP migration: #2349 (comment)