Add Device example that plays Twinkle Twinkle Little Star using native
UMP format. Demonstrates all MIDI 2.0 Channel Voice message types:
16-bit velocity, 32-bit CC, 32-bit pitch bend, 32-bit channel/poly
pressure, per-note management, program change with bank select, and
JR timestamps.
USB descriptor exposes both Alt Setting 0 (MIDI 1.0) and Alt Setting 1
(UMP) per USB-MIDI 2.0 specification.
Tested on: Raspberry Pi Pico (RP2040), Linux (ALSA), Windows (MIDI
Services)
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