Add swing/humanize feature in Advanced Settings layer

[tomasz-szymanek]

This PR introduces rhythmic expression tools to the WaveBard sample player by adding Swing and Humanize functionalities. A new control is mapped to the Settings layer (Pot 6), allowing users to either delay even steps for a rhythmic swing (55%–100% range) or apply pseudo-random timing offsets using a predefined pattern to simulate natural playing imperfections (0%–45% range). The implementation includes an updated trigger mechanism in the AudioLoop to handle clock-based delays and provides visual feedback via LED 1, which changes color to indicate the active mode. Additionally, the AppWaveBard class has been expanded with the necessary state variables and logic to manage these delayed trigger events seamlessly.

[tomasz-szymanek]

@xx0x Hello, I will be grateful for any advice, or even a quick look