* [vcpkg] Add new function vcpkg_copy_tools

* [cpuinfo][czmq][nanomsg][uriparser] Use vcpkg_copy_tools

* [czmq] Clean even tools are not copied

[libsvm][zyre] Use vcpkg_copy_tools

* [vcpkg-copy-tools] Clean debug/bin

This should fix czmq build error

* [czmq] czmq does not have BUILD_TOOLS option

* [vcpkg] Split clean logic into another function

* [cpuinfo][czmq][nanomsg][uriparser] Fix calling of vcpkg_copy_tools

* [zyre] Fix regression error

* [vcpkg] Update try_remove_empty_directory

* [libsvm] Fix vcpkg_copy_tools call

"source_" was missing in the name of the helper function. Fix typo:
vcpkg_extract_archive_ex -> vcpkg_extract_source_archive_ex

* [maintainer-guide] Initial commit of maintainer guidelines

* [maintainer-guide] Rearrange sections

* [maintainer-guide] Add note about GitHub Draft PRs

* [maintainer-guide] Improvements

* [maintainer-guide] Address comments about versioning conventions

* [maintainer-guide] Add section about how portfiles interact with CMakeLists.txt

* [maintainer-guidelines] Add link from docs index