Commander Rewrite

[isaac-mcfadyen]

This PR moves D1 Console from a DIY CLI implementation to commander, a popular Node.JS CLI framework.

Breaking changes:

• Commands such as USE, SHOW DATABASES, and CREATE DATABASE have been moved to dedicated subcommands (see --help for more information).
• Colors are back! 🎉 (but can be disabled with the --no-colors flag if needed for any reason)
• To choose the database to query, a new flag -d or --database is now used instead of the USE command inside the REPL.
• If you wish to use D1 Console in CI/CD pipelines, the flag --execute can be used to immediately execute a command. In addition, D1 Console will now prefer CLOUDFLARE_ACCOUNT_ID and CLOUDFLARE_API_TOKEN environment variables over the saved authentication (if any).

Closes #3
Closes #4