To-do list

Bind functions from RGFW (alternative back-end/window library) and have an option to use it
Bind gamepad functions from GLFW
- I have bindings for alpha letters, shift, enter and escape.
- I should learn layout next.
- After learning layout, I should design and implement symbols
Modify deletion functions to use PersistentVector.delete
Implement 'yj' motion and add tests for it