[POC][feature] find_libraries function

[franramirez688]

Changelog: Feature: Created find_libraries function (alternative to collect_libs).
Docs: https://github.com/conan-io/docs/pull/XXXX

[memsharded]

Ok, I now understand better the intent of this :)

My main comment is that I think we want to do this together with a re-design of the cpp_info capabilities (CPS-like) for defining libraries more explicitly, including types, import-libs and details like that

[memsharded]

No six import should be necessary anymore! I thought we had gotten rid of this 😅

[memsharded]

To discuss with the progress in #16054

[franramirez688]

Second round: #17105

[memsharded]

Closing this in favor of the new CppInfo based approach already merged in develop2