lodestone v0.4.1

Changed

• No more Node.js requirement. The Minecraft engine was rewritten from the
  Node/mineflayer sidecar to azalea, a
  pure-Rust headless client built into the app. Installing and running lodestone
  no longer needs Node.js (LODESTONE_NODE is gone), and the bots run inside the
  app instead of as separate processes.
• Resource readout is now a whole-app total. Because the bots share one
  process, CPU and memory are reported for the app as a whole rather than per
  account. Per-account status and uptime are unchanged.

Note

• Accounts must sign in again once after updating: the token cache format
  changed with the new engine.

Fixed

• Update Cargo.toml to change Rust edition from 2026 to 2021