ghostty: use matugen to set background colour

still uses tokyonight for a full colour theme but by setting the
background colour it makes ghostty blend into the theme a bit more.

stow/.config/ghostty/.gitignore

@@ -0,0 +1 @@
+matugen

stow/.config/ghostty/config

@@ -15,3 +15,5 @@ window-padding-y = 8
 quit-after-last-window-closed = false
 keybind = global:opt+shift+q=new_window
 keybind = global:cmd+opt+q=toggle_quick_terminal
+
+config-file = ?matugen

stow/.config/matugen/config.toml

@@ -76,3 +76,7 @@ post_hook = 'fish ~/.config/fish/pure_colours.fish'
 [templates.fuzzel]
 input_path = './templates/fuzzel.ini'
 output_path = '~/.config/fuzzel/colors.ini'
+
+[templates.ghostty]
+input_path = './templates/ghostty'
+output_path = '~/.config/ghostty/matugen'

stow/.config/matugen/templates/ghostty

@@ -0,0 +1 @@
+background = {{colors.background.default.hex}}