feature: Dim or turn off led light

[AshAnand34]

This pull request introduces support for PWM (Pulse Width Modulation) to control LED brightness in the firmware and provides an example integration for a UI to interact with this functionality. The changes include adding PWM configurations, new functions for setting LED brightness, and a JavaScript example for API-based control.

Related issue: #2317

Firmware Enhancements for LED Brightness Control:

• Added PWM device definitions for red, green, and blue LEDs in omi/firmware/devkit/src/led.c to enable brightness control.
• Updated the led_start function to check the readiness of the PWM devices and log that PWM support is enabled.
• Introduced new functions in omi/firmware/devkit/src/led.c to set LED brightness using PWM, including set_led_brightness, set_led_red_brightness, set_led_green_brightness, and set_led_blue_brightness.
• Added a high-level API function set_led_brightness_api to allow setting brightness for specific LEDs by color name, with error handling for invalid inputs.

UI Integration Example:

• Created a new JavaScript example in omiGlass/public/led_control_example.js to demonstrate how to send brightness control commands to the firmware via an API. This includes input validation and error handling for the API calls.

[vercel[bot]]

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[beastoin]

cool ! @AshAnand34

1/ could you share a demo video ?

[AshAnand34]

cool ! @AshAnand34

1/ could you share a demo video ?

Hi @beastoin. I don't have the device with me, unfortunately. Do you know if there is a way for me to demo this feature without the need for it?

[beastoin]

man, appreciate your time but testing is a must before sending a review request.

if you dont test, how would you know it works ?

so my suggestion is, either build the device yourself, or buy an omi device.

run the test on it and reopen the PR.

@AshAnand34