[FEATURE] Play feedback sound

Created by: peilingjiang

Is your feature request related to a problem? Please describe.

Describe the solution you'd like

As specified in the Threshold Manual Inputs sheet: https://docs.google.com/spreadsheets/d/1x65NjykMm-XUOz98Eu_oo6ON2xspm_h0Q0M2u6UGtug/edit#gid=1287694458

playNegativeFeedbackBeepBool FALSE After mistaken response, play pure 500 Hz tone for 0.5 sec at amplitude 0.05. Usually we stay positive and give only positive feedback. boolean playPositiveFeedbackBeepBool TRUE After correct response, play pure 2000 Hz tone for 0.05 sec at amplitude 0.05. boolean playPurrWhenReadyBool TRUE Play a purring sound to alert the observer while we await their response. Pure 200 Hz tone for 0.6 sec at amplitude 1. boolean playNegativeFeedbackBeepBool FALSE After mistaken response, play pure 500 Hz tone for 0.5 sec at amplitude 0.05. Usually we stay positive and give only positive feedback.

Additional context I just tried the current version at https://crowding-dev.netlify.app/ The sounds are present--THANK YOU-- but nothing like what is specified in the manual. Sorry, I should have linked to the manual in the original request. In the future, please ask when requests seem vague.