KeenTools/keentools-blender ? reverse-engineered prompt

Build me a Blender add on that lets users use KeenTools features inside Blender, especially face building and geo tracking for working with faces and tracking objects in a scene.

I want it to feel like a normal Blender tool, with panels and controls that are easy to find, so someone can load it, open Blender, and start using those KeenTools features without needing to figure out a lot of setup. Keep it focused on making the workflow smooth for creating and editing face models and tracking motion in 3D footage.

If there are any current KeenTools or Blender API details you need, look them up online and make sure the add on works with the latest release style. Also include basic tests if that makes sense, and keep the code clean enough that it could be maintained as a real Blender plugin.