* [vcpkg docs] Change how documenting port functions works
Instead of using `##`, use comment blocks for documentation.
Also, add some minor docs and change RST -> MD
so we actually get docs generated.
* add CI stuff
* regenerate docs
* fix vcpkg_find_acquire_program to not use _execute_process
* added function vcpkg_fail_port_install to fail the portfile under requested circumstances and display a standarized failure message
* added always option.
* fix linux regressions
* bump control for ci tu rerun