Alacritty toml instead of yaml

[DannyDannyDanny]

Current alacritty.yaml contains a dump of all gruvbox themes and several fonts. This isn't supported by alacritty.toml and Alacritty's inbuilt yaml-to-toml.

As specified in alacritty/alacritty-theme#installation...
import should probably be used.

WSL

Windows stores alacritty config file in /mnt/c/Users/<USER>/AppData/Roaming/alacritty/alacritty.toml.

Quick and dirty setup:

1. Clone alacritty themes (as specified in the alacritty-theme/README#installation:

   # We use Alacritty's default Linux config directory as our storage location here.
   mkdir -p ~/.config/alacritty/themes
   git clone https://github.com/alacritty/alacritty-theme ~/.config/alacritty/themes

2. Copy the desired theme over the alacritty.toml:

   cp ~/.config/alacritty/themes/themes/gruvbox_dark.toml /mnt/c/Users/dnth/AppData/Roaming/alacritty/alacritty.toml