Implement a MIDI File Decoder with the MIDI Standard

[jouae]

picosynth lacks a decoder capable of parsing MIDI files according to the official MIDI specification (at least MIDI1) [1].

Such a decoder is essential for enabling MIDI file editing and integration with picosynth.

A helpful tool mido, might help those who want to understand MIDI message quickly.

Reference:

1. https://midi.org/midi-1-0-core-specifications