docs(readme): added readme

readme.md

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+# hadron
+
+Simple rust utility to configure meson build directories in a TUI
+
+## Building
+```bash
+git clone https://github.com/tboudreaux/hadron
+cd hadron
+cargo build --release 
+```
+
+## Usage
+```bash
+hadron buildDir
+```
+
+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