more qol text navigation key bindings

[mgesbert]

Textual already implements some shortcuts like ctrl+w, ctrl+e, ctrl+d etc... we would like to cover other common shortcuts like alt+key arrows

[github-actions]

We found the following entry in the FAQ which you may find helpful:

• Why do some key combinations never make it to my app?

Feel free to close this issue if you found an answer in the FAQ. Otherwise, please give us a little time to review.

This project is developed and maintained by Will McGugan. Consider sponsoring Will's work on this project (and others).

This is an automated reply, generated by FAQtory

[TomJGooding]

alt+arrow keys already works in terminals that support the kitty keyboard protocol. See also the FAQ suggested above.

EDIT: I forgot that Textual already supports some alt+key combinations in other terminals (see #6267), so maybe it is possible to also handle other keys like arrows, etc.

There was a similar issue recently which I had also forgotten about, but I was wary about the linked AI-generated PR.