Greetings,

Currently, the only way to navigate through treesit-explorer is by the
use of C-n and C-p. Since this buffer is full of buttons, I decided to
add button navigation to it.

This patch adds button navigation to treesit-explorer, for the following
keys:

* forward-button
- f
- n
- TAB

* backward-button
- b
- p
- <backtab>

* Points of discussion

Maybe that's too many keys? The only ones I think that don't really fit
that much are "f" and "b", because they can also go down, but there's no
harm in having extra keys.

Regards,

--
Gabriel Santos