Add the quick accent feature

Hey there,

The quick accent functionality is incredibly useful for anyone with a qwerty keyboard that types in non english languages.
It provides a very easy and natural way to type accents without having specific keys for them.

Thank you for you work,
Good luck !

The issue names no files, tests, or entry points. First inspect the repository's existing utilities and keyboard-input handling, then define the supported quick-accent behavior and verify that it works for QWERTY users typing non-English languages.

Written by the indexing model from the issue text.