v0.7.0

Breaking Changes

• Rewrite Errors
  • Errors can now be prettified with miette
  • Errors now carry the error sources including the actual errors from the failed subsystems
• Display a warning if the Toplevel object isn't consumed (via handle_shutdown_requests)
• Cancel all subsystems connected to the Toplevel object when the Toplevel object is dropped

Non-breaking changes

• Change recommended error wrapper library from anyhow to miette.
  • Compatibility to other error handling wrapper libraries stays unchanged.
• Add IntoSubsystem trait to make writing struct-based subsystems more convenient