Added docs for external power output

docs/docs/behavior/power.md

@@ -0,0 +1,64 @@
+---
+title: Power Management Behaviors
+sidebar_label: Power Management
+---
+
+## Summary
+
+These page contains some of the power management behaviors currently supported by ZMK.
+
+## External Power Control
+
+The External power control behavior allows enabling or disabling the VCC power output
+to save power. Some of the LEDs will consume power even in OFF state. To preserve 
+battery life in this scenario, some controller boards have support to disable the
+external power completely.
+
+The following boards currently support this feature:
+- nRFMicro
+- nice!nano
+
+## External Power Control Command Defines
+
+External power control command defines are provided through the [`dt-bindings/zmk/ext_power.h`](https://github.com/zmkfirmware/zmk/blob/main/app/include/dt-bindings/zmk/ext_power.h) header,
+which is added at the top of the keymap file:
+
+```
+#include <dt-bindings/zmk/ext_power.h>
+```
+
+This will allow you to reference the actions defined in this header such as `EXT_POWER_OFF_CMD`.
+
+Here is a table describing the command for each define:
+
+| Define                 | Action                                 | Alias    |
+| ------------           | -------------------------------------- | -------- |
+| `EXT_POWER_OFF_CMD`    | Disable the external power.            | `EP_OFF` |
+| `EXT_POWER_ON_CMD`     | Enable the external power.             | `EP_ON`  |
+| `EXT_POWER_TOGGLE_CMD` | Toggle the external power.             | `EP_TOG` |
+
+### Behavior Binding
+
+- Reference: `&ext_power`
+- Parameter#1: Command, e.g `EP_ON`
+
+### Example:
+
+1. Behavior binding to enable the external power
+
+    ```
+    &ext_power EP_ON
+    ```
+
+1. Behavior binding to disable the external power
+
+    ```
+    &ext_power EP_OFF
+    ```
+
+1. Behavior binding to toggle the external power
+
+    ```
+    &ext_power EP_TOG
+    ```
+

docs/sidebars.js

@@ -23,6 +23,7 @@ module.exports = {
       "behavior/reset",
       "behavior/bluetooth",
       "behavior/lighting",
+      "behavior/power",
     ],
     Development: [
       "dev-clean-room",