Support for TYPE_USE for custom @Qualifier annotations and for the @Named one

[vlsi]

Currently, @Named does not support TYPE_USE target, so the following code does not compile:

...Provider<@Named("app.config") Properties>...

It would be great if Guice supported TYPE_USE for @Qualifiers as the qualifier seems to belong to a type rather than method/field/class.

At the same time, it might be worth recommending TYPE_USE as the only target for @Qualifier implementations. Of course, refactoring the current @Named might change a lot, so I would like to support TYPE_USE, and decide with @Named later.

See:

• Support and embrace TYPE_USE target for @Qualifier annotations jakartaee/inject#40
• Support for TYPE_USE for custom @Qualifier annotations dagger#4794
• Spring Framework supports TYPE_USE for its @Qualifier. Note that it supports FIELD, METHOD and so on for backward compatibility, and I think newly-created qualifier annotations should not have FIELD, METHOD, and the rest targets. TYPE_USE should be the right target just like jspecify's @Nullable
• Add support for Nullable as a TYPE_USE annotation #1193