Remove old bash script for setting up a new project, do everything in Zig to make it platform agnostic and give us an easy place to add scaffolding commands in future.
When serving content from `public/`, use MIME type lookup to provide an appropriate content-type header. MIME types borrowed from: https://mimetype.io/all-types https://github.com/patrickmccallum/mimetype-io/blob/master/src/mimeData.json