Removes old defines and work arounds for earlier wx versions and adds a
CMake requirement to use at least 3.2 (or the minimum matching wxPython
version)
The TOOL_ACTION_ARGS construction method is supposed to be fairly light
weight, so instead of creating/destroying strings all the time, pass
string_views to the actual string data instead.
wx doesn't currently support string_view -> wxString implicitly
currently, so we have to do the conversion ourself.
This library is meant to move non-EDA items (language extensions,
library extensions, etc.) into the lowest-level of our dependency chain.
This library should never depend on anyother non-thirdparty code in the
kicad codebase.