Publish CLI as an npm package

[anujmindfire]

Distribute the Go binary through npm so JavaScript developers can install it easily.

Requirements
Publish package
Download/copy correct binary during installation
Support: Linux, macOS, Windows
Verify checksum
Proper postinstall script
npm uninstall cleanup
Version synchronization
README updates

Acceptance Criteria

Users can install with
npm install -g @mindfiredigital/deepscanbot
and immediately run
deepscanbot --version