fix: add font vertical offset

Add an offset to the font using `offset.y` to add some vertical spacing
between each line to make things easier to read and more like I had it
in PhpStorm.

Also use `glyph.offset` to ensure that the spacing is balanced between
the lines rather than all being above each line, as this looks a bit odd
in Vim and with the tmux status line.

alacritty/.config/alacritty/alacritty.yml

@@ -13,6 +13,10 @@ font:
     family: 'JetBrains Mono'
     style: Regular
   size: 12
+  offset:
+    y: 10
+  glyph_offset:
+    y: 5
 
 # Nord
 colors: