Shared color palettes and face-setting infrastructure for the Batppuccin
family of themes.  This file is not a theme itself -- it is required by
the individual theme files (batppuccin-mocha-theme.el, etc.).

Batppuccin is an opinionated Emacs port of the Catppuccin color scheme,
following the official style guide while making Emacs-specific adjustments
for proper face usage.

See https://github.com/catppuccin/catppuccin for the upstream spec.