Add usage with Tailwind documentation

Add documentation on how to enable Tailwind IntelliSense inside `clsx` functions

Fixes lukeed#64

readme.md

@@ -83,6 +83,28 @@ All browsers that support [`Array.isArray`](https://developer.mozilla.org/en-US/
 
 - [obj-str](https://github.com/lukeed/obj-str) - A smaller (96B) and similiar utility that only works with Objects.
 
+## Tailwind CSS
+Here some additional (optional) steps to enable classes autocompletition using `clsx` with Tailwind CSS.
+<details>
+
+<summary>
+  Visual Studio Code
+</summary>
+
+1. [Install the "Tailwind CSS IntelliSense" Visual Studio Code extension](https://marketplace.visualstudio.com/items?itemName=bradlc.vscode-tailwindcss)
+
+2. Add the following to your [`settings.json`](https://code.visualstudio.com/docs/getstarted/settings):
+
+  ```json
+   {
+    "tailwindCSS.experimental.classRegex": [
+      ["clsx\\(([^)]*)\\)", "(?:'|\"|`)([^']*)(?:'|\"|`)"]
+    ]
+   }
+  ```
+</details>
+
+
 ## License
 
 MIT © [Luke Edwards](https://lukeed.com)