Snagboot

Changelog:

- treewide:
support passing USB paths (e.g. 3-1.2) to snagboot instead of
vid:pid addresses

- i.MX:
- Drop libhidapi dependency and add custom HID implementation
- Add support for i.MX53 SoCs

- AM335x:
- Improve POSIX compliance of setup script and make it compatible
with Fish shell

- AM62x:
- Update recovery flow for newer versions of U-Boot
- Add board template for phyBOARD-Lyra

- snagflash:
- Handle "continue" command gracefully
- Generalize handling of command parameters

Changelog:
- i.MX:
- Add i.MX8QM to SDPV SoCs
- snagflash/DFU: Add dfu-keep, dfu-detach and dfu-reset
- snagflash/UMS: various fixes, document creation of static block device paths
- AM335x:
- Fix issue where SPL output is confused with UART pings
- Catch spurious errors
- Fix race condition between BOOTP and TFTP servers
- Add progress bar for UART recovery
- Fix case conversion issue with firmware binary paths
- AM335x setup script:
- Improve robustness of SUDOER username detection
- Add custom shell prompt
- Fix issue where stdout is broken after exiting from recovery shell
- Silence spurious errors
- Document AM62Ax platforms and test AM62A7 device
- install: Fix issue where old builds confuse installation script
- pyproject: Change version-fetching method to avoid implicit setuptools dependency
- snagrecover/DFU: Catch spurious error on DFU_DETACH

Changelog:
- udev: use uaccess tags instead of group assignments
- fix and test i.MX8QM and i.MX93 supports
- homogenize i.MX firmware configuration interfaces
- don't require contributors to modify license headers
- fix README links on PyPI

First public release.