Update Frog Software to Mainline Micropython

[keenanjohnson]

Now that micropython/micropython#15764 is completed, we can stop using the ribbit network fork of micropython and instead use the main micropython repo as a submodule see #60

[keenanjohnson]

Initial testing looks like I broke something. This is the error I get when I try to set the DTLS credentials on this new release with a local device:

2025-03-24T19:49:03Z:INFO:ribbit.golioth:Starting Golioth integration
Task exception wasn't retrieved
future: <Task> coro= <generator object '_loop' at 3c16a100>
Traceback (most recent call last):
  File "asyncio/core.py", line 1, in run_until_complete
  File "ribbit/golioth/__init__.py", line 94, in _loop
OSError: (-24192, 'MBEDTLS_ERR_SSL_BAD_CONFIG')

[keenanjohnson]

Ah I see. I thought that the PSK support had already landed in micropython, but it looks like not. I'll need to wait until this is closed out before we can fully switch to mainline micropython: micropython/micropython#14396