Pass `share/pkgconfig` instead of `debug/share/pkgconfig`: The `share`
location is for config-independent data.
Integrate `CURRENT_PACKAGES_DIR` locations.
Change the function interface to take a CONFIG parameter instead of
prefix list (suggested below).
Use `z_vcpkg_setup_pkgconfig_path` also for `vcpkg_fixup_pkgconfig`
(which already had proper handling of `CURRENT_PACKAGES_DIR` and
`share`).
Remove redundant trailing slash.
Extend unit test.
Fixes consuming `wayland-protocols` and similar.
* [docs] Delete embedded documentation in favor of docs/
Drive-by for the helper ports:
1. "documentation": "https://vcpkg.io/en/docs/README.html"
2. "license": "MIT"
3. Use `include_guard(GLOBAL)` in all script files
4. Make sure any persistent variables are saved to the cache
* [docs] Restore empty regenerate.ps1 to satisfy Azure Pipelines
* [docs] PR comments
