docs(readme): added example image

readme.md

@@ -2,11 +2,12 @@
 
 Simple rust utility to configure meson build directories in a TUI
 
-## Building
+## Building & Installing
 ```bash
 git clone https://github.com/tboudreaux/hadron
 cd hadron
 cargo build --release 
+cargo install --path .
 ```
 
 ## Usage
@@ -19,3 +20,6 @@ You will be presented with a list of options for that meson project.
 - There are vim like motions to move around
 - space will toggle possible options or open an edit window for free form options
 - / will search
+
+## Example
+![example](assets/tui_example.png)