[Feature]: Return exports from IIFE independently of library type

[redstonekasi]

What problem does this feature solve?

Sometimes it is useful to return exports directly from the IIFE even if they aren't immediately consumed by anything. An eval for example, could then be used.
Currently there is no way to achieve this apart from using one of the library types that use ExportPropertyLibraryPlugin, such as amd and subsequently modifying the output asset.

What does the proposed API of configuration look like?

I propose adding a configuration that adds ExportPropertyLibraryPlugin to the configuration in addition to enabling the RETURN_EXPORTS_FROM_RUNTIME runtime requirement.
This could be exposed via a new return library type, for example.
I am not aware of a webpack equivalent for this; it is, however, trivial to implement yourself, in contrast to Rspack where such a thing is not easily accessible from JS.

[redstonekasi]

I have looked into this a bit more and it seems this can be quite nicely implemented in a plugin, unfortunately it seems that SWC has a bug that makes expression not work, as such the return is optimized out of the final bundle.