Warehouse Filebrowser

POC for Feature request: "view source" tool for inspecting package contents and Expose the METADATA file of wheels in the simple API.

This implements a simple web server that downloads, extracts, and displays “interesting” files from distributions available on PyPI.

Usage:

1. Run the server.
2. Navigate to /<project-name> to get a list of files.
3. Click on the file name of interest to view.

Any file name may return 404 if it does not actually exist in the distribution archive.