hyprsunset: Add IPC support (#976)

* Hypr Ecosystem/hyprsunset: Add IPC support

* Add gamma color accuracy warning

pages/Hypr Ecosystem/hyprsunset.md

@@ -8,6 +8,11 @@ for your system.
 
 This method is preferred to screen shaders as it will _not_ be captured via recording / screenshots.
 
+hyprsunset also provides a gamma filter, which can be used to
+adjust percieved display brightness on monitors that do not
+support software control, or to reduce percieved brightness
+below the monitor's minimum.
+
 {{< callout type=warning >}}
 
 `hyprsunset` is supported since Hyprland 0.45.0.
@@ -21,3 +26,37 @@ This method is preferred to screen shaders as it will _not_ be captured via reco
 ## Usage
 
 See `hyprsunset --help`.
+
+## IPC
+
+`hyprsunset` supports IPC via hyprctl. Both color temperature and the gamma filter are adjustable:
+```sh
+# Enable blue-light filter
+hyprctl hyprsunset temperature 2500
+# Disable blue-light filter
+hyprctl hyprsunset identity
+
+# Set gamma to 50%
+hyprctl hyprsunset gamma 50
+# Increase gamma by 10%
+hyprctl hyprsunset gamma +10
+```
+
+{{< callout type=warning >}}
+
+`hyprsunset` is supported since Hyprland 0.45.0.
+
+{{< /callout >}}
+
+This can be used by other software to change the temperature throughout the day, or to adjust perceieved
+monitor brightness, such as with the following Hyprland keybinds:
+```ini
+bindel = ,XF86MonBrightnessDown, exec, hyprctl hyprsunset gamma -10
+bindel = ,XF86MonBrightnessUp, exec, hyprctl hyprsunset gamma +10
+```
+
+{{< callout type=warning >}}
+
+Using the gamma control will degrade color accuracy. If your monitor does support software control, it is highly recommended to use that instead.
+
+{{< /callout >}}