How-To: timestamp and git-hash version esp32 firmware builds

Getting an ESP32 firmware to bear timestamp and git commit short hash as app version.

Zigbee: Hue-llo world!

Getting an ESP32-C6 "Hello, world!" lightbulb linked to Hue Bridge, and functioning reasonably.

Hue Engine: Reversing the PWM functions

Figuring out the math description of the PWM functions given the data I dumped.

Hue Engine: Dumping the PWM data

Dumping the PWM component data for individual color temperatures and brightnesses.

Hue Engine: Basic reconnaissance

We get to explore the Hue Engine board to some depth.