Feature: RGBLight layers (#7768)

* New feature: RGBLIGHT_LAYERS

This feature allows users to define multiple independent layers of lighting
that can be toggled on and off individually, making it easy to use your
RGB lighting to indicate things like active keyboard layer & modifier state.

* Demonstrate built in functions for layer state checking

Also link the video in the docs.

* Follow existing pattern for setting rgblight_status flags

* Eliminate rgblight_is_static_mode since it's not needed

Just check to see if the timer is enabled directly.

1 files changed, 2 insertions, 0 deletions

diff --git a/docs/config_options.md b/docs/config_options.md
index f19df022a..661cfccce 100644
--- a/docs/config_options.md
+++ b/docs/config_options.md
@@ -190,6 +190,8 @@ If you define these options you will enable the associated feature, which may in
   * pin the DI on the WS2812 is hooked-up to
 * `#define RGBLIGHT_ANIMATIONS`
   * run RGB animations
+* `#define RGBLIGHT_LAYERS`
+  * Lets you define [lighting layers](feature_rgblight.md) that can be toggled on or off. Great for showing the current keyboard layer or caps lock state.
 * `#define RGBLED_NUM 12`
   * number of LEDs
 * `#define RGBLIGHT_SPLIT`