Add CI and PyPI badges to README

Author: jacklowrie

README.md

@@ -1,4 +1,6 @@
 # ChordNet
+[![Main Branch Status](https://github.com/jacklowrie/chordnet/actions/workflows/main.yml/badge.svg)](https://github.com/jacklowrie/chordnet/actions/workflows/main.yml)
+[![PyPI Published](https://github.com/jacklowrie/chordnet/actions/workflows/publish.yml/badge.svg)](https://github.com/jacklowrie/chordnet/actions/workflows/publish.yml)
 Python implementation of the chord protocol, introduced by Stoica et al.
 This library began as a [group project](https://github.com/jacklowrie/chord) for cs536 at Purdue University in
 Fall 2024.