Describe the bug
Some of the ports I work with generate a complete .app bundle for some of their tools on macOS. vcpkg_copy_tools() unfortunately fails to detect it and copy to a location.

Environment

• OS: macOS

To Reproduce
Steps to reproduce the behavior:

1. Checkout [libalkimia] new port #20207
2. ./vcpkg install libalkimia[tools] on macOS

CMake Error at scripts/cmake/vcpkg_copy_tools.cmake:62 (message):
  Couldn't find tool "onlinequoteseditor5":

      "/Users/cromo/Documents/Sourcecode/vcpkg/packages/libalkimia_arm64-osx/bin/onlinequoteseditor5" does not exist

Expected behavior
Bundle directory should be treated as an executable and copied as if it was a regular ELF or Windows .exe.