* refactor(grid): move from scroll to grid (prototype with tests passing)
* refactor(grid): remove scrollbuffer
* fix(terminal): do not overflow cursor y position when resizing
* refactor(file-structure): move grid to different file
* fix(compatibility): vim horizontal resize
* fix(compatibility): various fixes for cursor movement
* style(grid): remove unused imports
* style(grid): remove debugging
* style(fmt): rustfmt
* style(fmt): rustfmt
