fix: added README

Author: febb0e

demo/README.md

@@ -0,0 +1,20 @@
+# demo
+
+-----
+
+## Table of Contents
+
+- [demo](#demo)
+  - [Table of Contents](#table-of-contents)
+  - [Installation](#installation)
+  - [License](#license)
+
+## Installation
+
+```console
+pip install demo
+```
+
+## License
+
+`demo` is distributed under the terms of the [MIT](https://spdx.org/licenses/MIT.html) license.