* ignition-modularscripts: move CMake config files only if necessary
Some ignition libraries (such as ignition-cmake2) already install the
CMake config file in the location required by vcpkg
* Add new port ignition-cmake2
* Add ignition-modularscript port
Modeled after the qt5-modularscript port, this port just contain
ignition_modular_library, an helper CMake function to simplify the
process of writing port of C++ libraries developed by the Ignition
Robotics project ( https://ignitionrobotics.org ).
* Add ignition-cmake0 port
* Add ignition-math4 port