LEAN CLI / Encrypted Project Decryption

[jaredbroad]

Support decrypting projects.

lean encrypt "My Project" --key=<<"file path"
lean decrypt "My Project" --key=<<"file path"

lean cloud encrypt "My Project" --key=<<"file path" # Pull, encrypt, save(push)
lean cloud decrypt "My Project" --key=<<"file path" # Pull, decrypt, save(push)

lean cloud pull/push "My Project" --encrypt --decrypt --encryption-key=<<"file path"

[jaredbroad]

@rjra2611 JA is working on Polygon integration. It would be super helpful if you could tackle this.