v0.6.0

Added

• idftool is now importable as a library, esptool-style: every command's
  logic is exposed as a plain function (write_image, factory, ota,
  read_partition, write_partitions, dump_bundle, …) that takes a
  State — which owns the serial connection — plus the same arguments as
  the CLI command. from idftool import State, write_image, factory, ota
  works with no import side effects, letting callers drive several
  operations over a single connection. The CLI is unchanged: each command
  is now a thin wrapper around its function.
• enter-bootloader with no -p/--port now shows an interactive picker of
  the visible serial ports (best-guess Espressif device first) with a
  "type manually" escape hatch, since the target may not have appeared yet.
  Falls back to the usual usage error when stdin isn't a TTY.

Fixed

• write-bundle no longer crashes with an internal StopIteration when
  flashing a bundle that includes the partition table; it now uses the
  resolved partition-table offset directly.
• print-table/list moved from the Discovery help panel into the
  Partition table panel.