Add README.md

Author: anssiko

README.md

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-# hybrid-ai
-Hybrid AI exploration
+# Hybrid AI Exploration 🧪
+
+This is a repository for the [Web Machine Learning Community Group](https://www.w3.org/groups/cg/webmachinelearning/) ([join](https://webmachinelearning.github.io/community/#join)) to continue discussion on the [Hybrid AI Exploration proposal](https://github.com/webmachinelearning/proposals/issues/5).
+
+## Scope of Work
+
+This repository hosts discussions ([issues](https://github.com/webmachinelearning/hybrid-ai/issues)) and any [non-normative reports](https://webmachinelearning.github.io/charter/#non-normative-reports) such as use cases, requirements, or white papers.
+
+Any spec incubations informed by discussions in this repository require a [charter change](https://webmachinelearning.github.io/charter/#charter-change).
+
+## Code of Conduct
+
+The Web Machine Learning Community Group operates under the [W3C Code of Conduct](https://www.w3.org/policies/code-of-conduct/).