bk72xx seems not handled

[harsh2029]

My device config file has bk72xx device configuration:

bk72xx:
  board: cbu

The build-action fails at Get IDEData:

    File "/entrypoint.py", line 337, in <module>
      sys.exit(main(sys.argv))
               ^^^^^^^^^^^^^^
    File "/entrypoint.py", line 294, in main
      shutil.copyfile(source_factory_bin, dest_factory_bin)
    File "/usr/local/lib/python3.12/shutil.py", line 260, in copyfile
      with open(src, 'rb') as fsrc:
           ^^^^^^^^^^^^^^^
  FileNotFoundError: [Errno 2] No such file or directory: '/github/workspace/devices/.esphome/build/test_device/.pioenvs/test_device/firmware.factory.bin'