Cursor currently can go off screen without repositioning.

[ClementTsang]

Describe the bug

A clear and concise description of what the bug is and what the expected behaviour was:

Due to us not repositioning to where the cursor is, if you put a huge query and scroll left, it will not automatically redraw to where the cursor is.

To reproduce

Steps on how to reproduce the behaviour:

1. Type in a huge message
2. Scroll left until you go off screen

Screenshots

If applicable, add screenshots to help explain your problem:

Platform

Provide information on:

Operating System: AL

Terminal: Kitty

Any other relevant information (more details are always good!):

Additional context

If anything hasn't been covered by the above categories, state it down here:

[ClementTsang]

Logic to solve this can follow the same logic as my scrollling trick. Just need to rewrite it to fit the requirements of a cursor (LR vs UD, naming, etc.)

[ClementTsang]

Almost lied to myself there, there was a bit of work needed to be done to go from the existing byte-based cursor position to adding an extra char based one in order to properly sync up the canvas and app state.

Testing with unicode (especially stuff like CJK) is a MUST.