Reorganize web midi connector

[mickmister]

Right now we're basing a lot of midi data structure types off of the easy-midi package's types. This package is not compatible with the browser, so this leads to headaches and forcing imports using import type.

jamtools-local/shared/types/easy_midi_types.ts

Line 1 in 18fceb5

import type easymidi from 'easymidi';

---

Let's converge on common data structures and midi API that is not dependent on a given external package's model.

I'm thinking we can converge on a common library to use, e.g. https://midival.github.io