Fix CDC fallback logic/path, add ESP32 CDC examples

[Syndric]

Fix CDC fallback paths to work with dual ESP32, one as a host and the other as a peripheral.

• Fixed a small typo, host_line_coding was being get, not set
• Asserted the USB control line. Otherwise, communication only works one way from Host -> Peripheral.
• Added examples for ease of testing
• Fixed panic if invalid state upon CDC disconnect
• Fix reconnection logic with semaphore
• Added delays to allow for CDC to stabilize (use case: pressing the reset on peripheral)