refactor(docs): Convert the keymaps section into a base folder (#2430)

Co-authored-by: Cem Aksoylar <caksoylar@users.noreply.github.com>

docs/docs/keymaps/behaviors/backlight.md

@@ -0,0 +1,61 @@
+---
+title: Backlight Behavior
+sidebar_label: Backlight
+---
+
+## Summary
+
+This page contains [backlight](../../features/backlight.mdx) behaviors supported by ZMK.
+
+## Backlight Action Defines
+
+Backlight actions defines are provided through the [`dt-bindings/zmk/backlight.h`](https://github.com/zmkfirmware/zmk/blob/main/app/include/dt-bindings/zmk/backlight.h) header,
+which is added at the top of the keymap file:
+
+```dts
+#include <dt-bindings/zmk/backlight.h>
+```
+
+This will allow you to reference the actions defined in this header such as `BL_TOG`.
+
+Here is a table describing the action for each define:
+
+| Define     | Action                      |
+| ---------- | --------------------------- |
+| `BL_ON`    | Turn on backlight           |
+| `BL_OFF`   | Turn off backlight          |
+| `BL_TOG`   | Toggle backlight on and off |
+| `BL_INC`   | Increase brightness         |
+| `BL_DEC`   | Decrease brightness         |
+| `BL_CYCLE` | Cycle brightness            |
+| `BL_SET`   | Set a specific brightness   |
+
+## Behavior Binding
+
+- Reference: `&bl`
+- Parameter #1: The backlight action define, e.g. `BL_TOG` or `BL_INC`
+- Parameter #2: Only applies to `BL_SET`and is the brightness value
+
+:::note[Backlight settings persistence]
+The backlight settings that are changed via the `&bl` behavior will be saved to flash storage and hence persist across restarts and firmware flashes.
+They will also override the start values set by [`CONFIG_ZMK_BACKLIGHT_*_START` settings](../../config/backlight.md#kconfig).
+However the settings will only be saved after [`CONFIG_ZMK_SETTINGS_SAVE_DEBOUNCE`](../../config/system.md#general) milliseconds in order to reduce potential wear on the flash memory.
+:::
+
+### Examples
+
+1. Toggle backlight on/off
+
+   ```dts
+   &bl BL_TOG
+   ```
+
+1. Sets a specific brightness
+
+   ```dts
+   &bl BL_SET 50
+   ```
+
+## Split Keyboards
+
+Backlight behaviors are [global](../../features/split-keyboards.md#global-locality-behaviors): This means that when triggered, they affect both the central and peripheral side of split keyboards.