Recognize `Meta+Left` and `Meta+Right` for word navigation
I'm not sure exactly where to find canonical documentation for these codes, but this seems to match what my terminal produces (macOS + iTerm2+ Fish + Tmux).
It might also be nice to have some more support for editing the bindings for these characters; sequences of more than one character are not supported by el_bind_key and similar.
See: https://git.lix.systems/lix-project/lix/issues/501
If you are looking for a reference for terminal codes, see: https://terminalguide.namepad.de/
@troglobit Still looking for a review on this, thanks!
I'll try to make some time this coming weekend, sorry.
There, merged! Sorry for taking so long.