docs: peer deps validation

references #2

README.md

@@ -3,3 +3,16 @@
 [![trunk](https://github.com/prisma/nexus-prisma/actions/workflows/trunk.yml/badge.svg)](https://github.com/prisma/nexus-prisma/actions/workflows/trunk.yml)
 
 Official Prisma plugin for Nexus
+
+## Features
+
+### Opt-outable friendly runtime peer dependency checks
+
+When `nexus-prisma` is imported it will validate that your project has peer dependencies setup correctly.
+
+If a peer dependenvy is not installed it `nexus-prisma` will log an error and then exit 1. If its version does not satify the range supported by the current version of `nexus-prisma` that you have installed, then a warning will be logged. If you want to opt-out of this validation then set an envar as follows:
+
+```
+NO_PEER_DEPENDENCY_CHECK=true|1
+PEER_DEPENDENCY_CHECK=false|0
+```