docs: add pip install command

Author: klesh

README.md

@@ -12,6 +12,12 @@ Tested on **Windows 11 Build 22000** and **Python 3.11.1**.
 Should work on **Windows 10** and **Python 3.8**
 
 
+Install from pypi
+```
+pip install jigsawwm
+```
+
+Install from github repo
 ```
 pip install git+https://github.com/klesh/JigsawWM.git
 ```