update readme

Author: lukepistrol

README.md

@@ -1,3 +1,11 @@
 # CodeEditLanguages
 
-A description of this package.
+A collection of `tree-sitter` languages for syntax highlighting.
+
+## Overview
+
+This package includes a binary framework `CodeLanguagesContainer.xcframework` which bundles all languages as a binary.
+
+The languages are then served as a `CodeLanguage`.
+
+> Documentation is currently not available online. Clone the product and build the documentation locally instead.