docs: Move more sections under hardware integration (#2704)

docs: Move battery sensing hardware integration to new page

docs: Refactor lighting hardware integrations to new category

docs: Link to pin control page from lighting pages

docs: Consolidate lighting feature pages

docs: Remove incorrect redirect

docs: Consolidate lighting config pages

docs/blog/2020-08-12-zmk-sotf-1.md

@@ -14,7 +14,7 @@ With interest and Discord activity growing, it seemed important to lay out the p
 
 There's been lots of various activity in ZMK land!
 
-- [Nicell](https://github.com/Nicell) (nice!nano creator) contributed initial [RGB Underglow](/docs/features/underglow) ([#64](https://github.com/zmkfirmware/zmk/pull/64)) support to ZMK.
+- [Nicell](https://github.com/Nicell) (nice!nano creator) contributed initial [RGB Underglow](/docs/features/lighting#rgb-underglow) ([#64](https://github.com/zmkfirmware/zmk/pull/64)) support to ZMK.
 - Tons of [documentation](/docs) work.
 - Refactoring ([#73](https://github.com/zmkfirmware/zmk/pull/73), [#74](https://github.com/zmkfirmware/zmk/pull/74)) of [keymaps](/docs/keymaps) to make them simpler for users.
 - Mod-Tap Behavior (docs coming!) is much improved ([#69](https://github.com/zmkfirmware/zmk/pull/69)) and usable now.

docs/blog/2022-04-02-zephyr-3-0.md

@@ -73,7 +73,7 @@ The following changes have [already been completed](https://github.com/zmkfirmwa
 
 ### RGB Underglow
 
-Zephyr's WS2812 `led_strip` driver added a new required property. When adding [underglow](/docs/features/underglow#adding-rgb-underglow-to-a-board) to a board, you now must also add the additional include `#include <dt-bindings/led/led.h>` at the top of your devicetree file, and add a `color-mapping` property like:
+Zephyr's WS2812 `led_strip` driver added a new required property. When adding [underglow](/docs/features/lighting#adding-rgb-underglow-support-to-a-keyboard) to a board, you now must also add the additional include `#include <dt-bindings/led/led.h>` at the top of your devicetree file, and add a `color-mapping` property like:
 
 ```dts
 led_strip: ws2812@0 {

docs/blog/2022-04-10-zmk-sotf-5.md

@@ -130,7 +130,7 @@ Another persistent bug that Apple users experienced was related to crashes and p
 
 The long awaited locality enhancement was finally merged by [petejohanson] in [#547](https://github.com/zmkfirmware/zmk/pull/547), allowing more fine grained control of where certain behaviors are invoked. Some key improvements thanks to the changes:
 
-- [RGB Underglow](/docs/features/underglow) behaviors now run globally, so enabling/disabling RGB, changing the color, animation, etc. applies to both sides of a split properly.
+- [RGB Underglow](/docs/features/lighting#rgb-underglow) behaviors now run globally, so enabling/disabling RGB, changing the color, animation, etc. applies to both sides of a split properly.
 - [Reset](/docs/keymaps/behaviors/reset#reset)/[Bootloader](/docs/keymaps/behaviors/reset#bootloader-reset) behaviors now run wherever the key was pressed. For example, adding a `&bootloader` reference to the peripheral side of a split will now put that side of the split into the bootloader when pressed.
 
 #### Split Connections
@@ -141,7 +141,7 @@ The long awaited locality enhancement was finally merged by [petejohanson] in [#
 
 #### Backlight
 
-[bortoz](https://github.com/bortoz) added [single color backlight support](/docs/features/backlight) in [#904](https://github.com/zmkfirmware/zmk/pull/904) for those keyboards that have it as an alternative to RGB underglow.
+[bortoz](https://github.com/bortoz) added [single color backlight support](/docs/features/lighting#backlight) in [#904](https://github.com/zmkfirmware/zmk/pull/904) for those keyboards that have it as an alternative to RGB underglow.
 
 #### E-Paper Display (EPD) Driver
 

docs/blog/2023-10-05-zmk-sotf-6.md

@@ -130,7 +130,7 @@ This refactor paved way to implementing a long-awaited feature, encoder support
 
 #### Underglow auto-off options
 
-[ReFil] added two [new RGB auto off options](/docs/config/underglow), one using an idle timeout and the other USB status in [#1010](https://github.com/zmkfirmware/zmk/pull/1010).
+[ReFil] added two [new RGB auto off options](/docs/config/lighting#rgb-underglow), one using an idle timeout and the other USB status in [#1010](https://github.com/zmkfirmware/zmk/pull/1010).
 
 #### nice!view support