cmake: Add introspection module

Co-authored-by: Cory Fields <cory-nospam-@coryfields.com>
Co-authored-by: Vasil Dimov <vd@FreeBSD.org>

CMakeLists.txt

@@ -74,6 +74,8 @@ target_link_libraries(core_interface INTERFACE
   $<$<CONFIG:Debug>:core_interface_debug>
 )
 
+include(cmake/introspection.cmake)
+
 # TODO: The `CMAKE_SKIP_BUILD_RPATH` variable setting can be deleted
 #       in the future after reordering Guix script commands to
 #       perform binary checks after the installation step.