PIP-108: Pulsar Feature Matrix (Client and Function)

• Status: Accepted
• Author: Anonymitaet
• Contributor: Anonymitaet, Rui Fu (feel free to add your names if missing)
• Doc Link: https://docs.google.com/spreadsheets/d/1YHYTkIXR8-Ql103u-IMI18TXLlGStK8uJjDsOOA0T20/edit#gid=1784579914