Add USB MIDI support to libraries/USB

[EleotleCram]

Description of Change

This PR adds support for USB MIDI to libraries/USB. It wraps the underlying tiny-usb API in an Arduino-like/User-friendly API, similar to the already existing USBHID* classes.

Tests scenarios

All the examples have been tested using an ESP32-S2 Mini. Please see the related links section for video-proof that it works.

Related links

• MIDI Music Box Demo - https://youtu.be/JFrc-wSmcus
• MIDI Interface Demo - https://youtu.be/BXG5i55I9s0
• MIDI Controller Demo - https://youtu.be/Y9TLXs_3w1M

[me-no-dev]

Very nice implementation!

• You need to add USBMIDI.cpp here
• There are also some other build errors reported by CI here

[EleotleCram]

Thanks!

And I was already suspicious on how silent the arduino-cli output was, I just discovered the --warnings all option ;-)
Will fix this shortly.

[lucasssvaz]

Working as expected

[P-R-O-C-H-Y]

@EleotleCram PTAL on my comments.
Also please add skip files to examples for esp32c6 and esp32h2.
Thanks! Good job :)

[VojtechBartoska]

Hello @EleotleCram,

thanks for you PR.

Unfortunately it seems that CLA form did not show up for your first contribution. Can you please check https://cla-assistant.io/ if you have the CLA signed for this repository.

Thanks a lot

[EleotleCram]

@VojtechBartoska AFAIK I already signed the CLA for this repository; when I log in to cla-assistant and I view my signed CLAs it lists this repo.

[EleotleCram]

@EleotleCram PTAL on my comments. Also please add skip files to examples for esp32c6 and esp32h2. Thanks! Good job :)

@P-R-O-C-H-Y , I just noticed things were moving again for this PR. I've checked your comments, but it seems the changes have already been made by now, do I need to take further action?

[P-R-O-C-H-Y]

Hi @EleotleCram, I took over the PR and fixed all the stuff we noticed in the reviews.
If the CLA is signed as you said we are ready to merge it :)