Wesley Ellis b7ed9adb6c Add initial TOTP watch face impl
Vendor code from https://github.com/Netthaw/TOTP-MCU to do the
heavy lifting of computing SHA-1 and HMAC and the rest of TOTP

Also implement a date_time to unix timestamp method
2021-11-22 21:37:21 -05:00
..
2021-10-16 12:58:14 -04:00
2021-11-22 21:37:21 -05:00