Tomato timer for recording time

[Apollo1840]

• feature dev

• what is this feature about?
  build a timer in homeview to enable study time recording

• potential affected files?
  /frontend/src/components/homeview/homevierw.js
  /backend/studytimeboard/routers.py

• are there some depending RP that is not approved yet?
  no

reference:
https://www.youtube.com/watch?v=0PnSEPm2UKY&ab_channel=SiphiwoJulayi
https://github.com/Siphiwo/pomodoro-app-with-react/tree/master