Improvements to +default/yank-buffer-path and related commands

[chloelee767]

There are a couple of changes I've made in my personal config around the +default/yank-buffer-path and +default/yank-buffer-path-relative-to-project commands, I'd wondering whether others would find this useful and whether it could be worth adding to doom's defaults:

1. If there's a region currently selected while we call the +default/yank-buffer-path function, include the line numbers.
   • Eg. ~/dotfiles/doom/.doom.d/autoload.el:27, ~/dotfiles/doom/.doom.d/autoload.el:27-31
   • If there's no active region, no changes from the current behaviour, ie. ~/dotfiles/doom/.doom.d/autoload.el
2. Add keybinding to yank buffer filename only. Eg. autoload.el, autoload.el:27-31 etc
   • For this one, I've put this under Spc -> f -> Ctrl+y in my own config to make it easy to remember like y and Shift+y. But, I'm not sure if this is the best keybinding, I don't see any other leader key keybinds using Ctrl.

My current personal implementation:
https://github.com/chloelee767/dotfiles/blob/99a362bb27d863dea8ab878940f225e492cdda19/doom/.doom.d/autoload.el#L3-L45
https://github.com/chloelee767/dotfiles/blob/fc14dc873a10c216cf8e31b158a37531dd861cd5/doom/.doom.d/config.el#L230-L232

I'd be happy to help to open a PR if there's interest !