docs(readme): clarify structure

Author: imsnif

README.md

@@ -3,7 +3,10 @@
 
 From Zero to "Hello world!" inside a Zellij Rust plugin with one keyboard shortcut.
 
+### How does it work?
+
 All you have to do is think of a name for your new plugin and this wizard will:
+
 1. Clone the [rust-plugin-example][rust-plugin-example] template repository into a folder by that name in your project directory
 2. Create a development workspace for you as a new tab, with your `$EDITOR` and [a helper plugin](https://github.com/zellij-org/develop-rust-plugin) to compile and run your plugin