"Stop" model beta 20241016.2

A smaller model for detecting "stop" using samples from the Google Speech Commands dataset. This is not intended to be used as a generic on-all-the-time wake word! At the default 0.5 probability cutoff, there was a around 1 false accept per hour on the DipCo dataset. The other released wake words have at most 0.2 false accepts per hour on that dataset at the default settings. This is instead meant to run only at specific times; i.e., a timer is ringing and you say "stop" to end it. Then the model should be disabled. Note enabling and disabling models isn't possible yet in the current microWakeWord component in ESPHome, but it support will be added in the future.

This is an early version of the model, and I will be working on training a better one.