Add CDN usages for cdn.simpleicons.org (simple-icons#8000)

* Add usages for `cdn.simpleicons.org`

* Fixes

* Update README.md

README.md

@@ -41,6 +41,27 @@ Where `[ICON SLUG]` is replaced by the [slug] of the icon you want to use, for e
 
 These examples use the latest major version. This means you won't receive any updates following the next major release. You can use `@latest` instead to receive updates indefinitely. However, this will result in a `404` error if the icon is removed.
 
+#### CDN with colors
+
+We also provide a CDN service which allows you to use colors.
+
+```html
+<img height="32" width="32" src="https://cdn.simpleicons.org/[ICON_SLUG]" />
+<img height="32" width="32" src="https://cdn.simpleicons.org/[ICON_SLUG]/[COLOR]" />
+```
+
+Where `[COLOR]` is optional, and can be replaced by the [hex colors](https://developer.mozilla.org/en-US/docs/Web/CSS/hex-color) or [CSS keywords](https://www.w3.org/wiki/CSS/Properties/color/keywords) of the icon you want to you use. The color is defaulted to the HEX color of the icon shown in [simpleicons.org website](https://simpleicons.org). For example:
+
+```html
+<img height="32" width="32" src="https://cdn.simpleicons.org/simpleicons" />
+<img height="32" width="32" src="https://cdn.simpleicons.org/simpleicons/gray" />
+<img height="32" width="32" src="https://cdn.simpleicons.org/simpleicons/hotpink" />
+<img height="32" width="32" src="https://cdn.simpleicons.org/simpleicons/0cf" />
+<img height="32" width="32" src="https://cdn.simpleicons.org/simpleicons/0cf9" />
+<img height="32" width="32" src="https://cdn.simpleicons.org/simpleicons/00ccff" />
+<img height="32" width="32" src="https://cdn.simpleicons.org/simpleicons/00ccff99" />
+```
+
 ### Node Usage <img src="https://raw.githubusercontent.com/simple-icons/simple-icons/develop/icons/nodedotjs.svg#gh-light-mode-only" alt="Node" align=left width=24><img src="https://raw.githubusercontent.com/simple-icons/simple-icons/develop/assets/readme/nodedotjs-white.svg#gh-dark-mode-only" alt="Node" align=left width=24>
 
 The icons are also available through our npm package. To install, simply run: