Add user guide

userGuide/README.md

@@ -0,0 +1,20 @@
+# Eden-sim - User Guide
+
+## Introduction
+This folder contains the user guide for the simulation library. The documentation can be accessed using a browser via book/index.html. 
+
+## Prerequisites
+The user guide can be read without any prerequisites other than a browser to read the book/index.html
+
+To build the book, a rust and mdbook installation is required. See [rust installation guide](https://rust-lang.github.io/rustup/installation/index.html) and [mdbook installation guide](https://rust-lang.github.io/mdBook/guide/installation.html).
+
+## Usage
+To build the book :
+```console
+mdbook build
+```
+
+To serve the book :
+```console
+mdbook serve --open
+```