Emit dist/basecoat-{style}.bundle.css for every style pack, plus
dist/basecoat.bundle.css (Vega alias) and dist/basecoat-base.bundle.css.
Each is the uncompiled source with relative @imports inlined, so it can
be downloaded as one file (e.g. from jsDelivr) and imported after
tailwindcss. Compiling a bundle produces byte-identical output to the
split entrypoint.
Document the bundles on the installation page and fix the description
of basecoat-css/all.css, which is an alias for the default stylesheet.
Refs #150
Grug