Document `conan.tools.files.collect_libs()` (#2700)
Document `conan.tools.files.collect_libs()` (#2700)

* document conan.tools.files.collect_libs()

* Update reference/conanfile/tools/files/basic.rst

Co-authored-by: Chris Mc <5ace0ae1f00e297b956266c6795f181dbe99580c@gmail.com>

Co-authored-by: Carlos Zoido <2accafae6a9d696f958aa2dba27077cd7a20a336@gmail.com>
Co-authored-by: Chris Mc <5ace0ae1f00e297b956266c6795f181dbe99580c@gmail.com>
conan-io/docs,conan-io/docs,conan-io/docs,conan-io/docs