docs: add badges for build status, license and auto-wiki

Author: turadg

README.md

@@ -2,6 +2,11 @@
 
 # Agoric Platform SDK
 
+![unit tests status](https://github.com/Agoric/agoric-sdk/actions/workflows/test-all-packages.yml/badge.svg)
+![integration tests status](https://github.com/Agoric/agoric-sdk/actions/workflows/integration.yml/badge.svg)
+[![license](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](./LICENSE)
+[![Mutable.ai Auto Wiki](https://img.shields.io/badge/Auto_Wiki-Mutable.ai-blue)](https://wiki.mutable.ai/Agoric/agoric-sdk)
+
 This repository contains most of the packages that make up the upper
 layers of the Agoric platform, with
 [the endo repository](https://github.com/endojs/endo)