GTK4 Migration: The Management Game

You play as the newly hired senior C++ developer with experience in gtkmm. Your task is to complete essential steps in the GTK4 migration for Inkscape over a four month time period. You'll need to ensure that the C++ bindings (gtkmm, pangomm, cairomm, etc.) are adequate and work closely together with an Inkscape expert with intimate knowledge of the Inkscape codebase. Will you be able to complete the migration on time and become the hero of the Inkscape project?