Esptool

New Features

- **flasher_stub**: Increase CPU frequency and write/read speeds over native USB (USB-OTG)
- **flasher_stub**: Increase CPU frequency and write/read speeds over USB-JTAG/Serial
- Readable error message for serial-related issues
- Detect Guru Meditation errors

Bug Fixes

- Add workaround for breaking changes of bitstring==4
- close unused ports while get_default_connected_device

New Features

- **image_info**: Print application information if possible
- Add Macronix flash memory density definitions
- **write_flash**: Prevent flashing incompatible images
- Recover from serial errors when flashing
- Add stub flasher error messages definitions
- **image_info**: Image type autodetection

Code Refactoring

- **elf2image**: Simplify bootloader image selection