Improve readme

README.md

@@ -5,6 +5,28 @@
 
 [factorialco.github.io/factorial-one/](https://factorialco.github.io/factorial-one/)
 
+## Usage
+
+In your react project:
+
+```bash
+$ npm install git+https://github.com/factorialco/factorial-one#release
+```
+
+Then, in your react files:
+
+```tsx
+// In your `main.tsx` file or any top-level component
+import "@factorialco/factorial-one/dist/styles.css"
+
+// In any of your components
+import { Button } from "@factorialco/factorial-one"
+```
+
+And that's it!
+
+## Development
+
 How to run:
 
 ```bash