docs: documented color palette

.wiki/Kernel-documentation.md

@@ -284,6 +284,19 @@ More information can be found on the limine project's [GitHub](https://github.co
 ## drivers
 
 ### graphics/color.h
+
+#### `color_palette_E` - enum
+Indexes for `g_color_palette`
+  - **Grey Dark**
+  - **Pink**
+  - **Signal Green**
+  - **Orange**
+  - **Blue**
+  - **Purple**
+  - **Green**
+  - **Grey Light**
+  - **Red**
+
 #### `color_argb_T` - struct
 | Name  | Type    | Description                     |
 |-------|---------|---------------------------------|
@@ -295,6 +308,10 @@ More information can be found on the limine project's [GitHub](https://github.co
 #### `color_argb_blend_alpha(background, foreground)` - function (color_argb_T)
 Blends **_background_** and **_foreground_** with the _alpha_ value of **_foreground_**.
 
+#### `g_color_palette` - global variable
+An array of standard colors.
+This array is indexed using `color_palette_E`.
+
 ### graphics/font.h
 #### `font_T` - struct