Day 6 - song progress timer complete with the help of codex

Didn’t realize how complicated calculating song duration from an MP3 would be. You would think duration is stored in metadata but you actually need to do some reverse engineering & check for a bunch of different compression formats yada yada

Anyways now a basic timer is working. Also replaced the headphone jack with speakers like the engineers of the MAX98357 amp modules intended. Still lots more to implement like file navigation and song selection