Expand selection to whole word when pressing `*`

[magopian]

trafficstars

Closes #6045

This is an attempt at adding the functionality discussed in this issue (and earlier on matrix).

I'm open to suggestions, I've barely learned Rust, and it was a long time ago and seldom used it, so i'm very... rusty.

Please let me know if this is useful, relevant, and how it could be improved!

[magopian]

Thanks for the feedback, I've updated the keymap.md file accordingly 👍

[firstrow]

nice improvement. going to test it locally. currently was using this config:

"*" = ["move_prev_word_start", "move_next_word_end", "search_selection", "global_search"]

[ubitux]

I think it makes sense to encapsulate the word between \b to prevent overmatching

[the-mikedavis]

I believe Kakoune also adds \b in some cases with *. I think it would be a nice improvement to move our * closer to Kakoune's behavior - though that should be a follow-up PR