* s/esp-radio-preempt-baremetal/esp-preempt/g
esp-preempt will hopefully one day be more useful than just a scheduler
for esp-radio, therefore I've removed the radio prefix for that future
goal. I also felt that baremetal didn't really add much other than
noise, so I've removed that postfix too.
* fix xtask
* remove test code
* fixups
* Move all `embassy` examples to `async` and convert to individual projects
* Move all peripheral examples to `peripheral` and convert to individual projects
* Move all interrupt examples to `interrupt` and convert to individual projects
* Move all `ble` examples to `ble` and convert to individual projects
* Move all `esp-now` examples to `esp-now` and convert to individual projects
* Move all Wi-Fi examples to `wifi` and convert to individual projects
* Move all `ieee802154` examples to `ieee802154` and convert to individual projects
* Move all OTA examples to `ota` and convert to individual projects
* Remove files which are no longer required
* Update `xtask` to handle new examples project layout
* Update `examples/README.md`
* Don't hide TOML parsing error in `is_published`
* Update `fmt-packages` subcommand to handle new examples project layout
