• Marks Move 2 and compiler v2 as stable.
• Adds new --move-2 flag to work with Move 2 without need for multiple other flags.
• Adds aptos move lint to produce lint warnings for the current package. Only a few lint rules are implemented for now,
  but more are coming.
• Adds aptos move fmt, which runs the Move formatter, movefmt, on the current package. Also adds
  aptos update movefmt. This installs / updates the movefmt binary.
• Adds safe methods to delete a profile, to rename a profile, and to output the private key of a profile.