Add setup command

[bgins]

Summary

Problem

The current implementation of CLI does not have a Rust native setup command.

Impact

We rely on the wrapped CLI for this command. Let's re-write this! 🦀

We also have a bit of a bootstrapping problem. To use the wrapped CLI, a user must already have the existing CLI installed and available on their path.

Solution

Rewrite the fission setup command in Rust.

Tasks will at least include:

• Detect the user's OS and Arch (for example, ARM64 vs AMD64)
  • Add Windows support
• Download the existing CLI and Kubo binaries
• Generate key pairs for user
  • Agent key
    • ed25519 key pair (currently named machine key)
  • Sharing key
    • Currently known as exchange key
    • Used for compatibility with Webnative shared private files?
• Ask the user if they have an existing account (skip prompt on first version)
• Prompt the user to create an account with username and email
  • Do we still need email?
• Create IPFS configs and CLI configs
  • IPFS config
    • Add bootstrap peers
    • More?

Considerations

We should already have the ability to communicate with local IPFS daemon using the HTTP RPC API.