ADD MAINTAINERS file

Add explicit note on written, open governance.

Author: qu1queee

MAINTAINERS.md

@@ -0,0 +1,14 @@
+# Maintainers
+
+The current Maintainers Group for the Shipwright Project consists of:
+
+| Name              | Employer | GitHub ID                                             | Responsibilities           |
+| ----------------- | -------- | ----------------------------------------------------- | -------------------------- |
+| Sascha Schwarze   | IBM      | [SaschaSchwarze0](https://github.com/SaschaSchwarze0) | Administrator, Maintainer  |
+| Adam Kaplan       | Red Hat   | [adambkaplan](https://github.com/adambkaplan)        | Administrator, Maintainer  |
+| Enrique Encalada  | IBM      | [qu1queee](https://github.com/qu1queee)               | Administrator, Maintainer  |
+
+
+This list must be kept in sync with the [CNCF Project Maintainers list](https://github.com/cncf/foundation/blob/master/project-maintainers.csv).
+
+The Project Governance and roles definition is under development. This document will be updated in the future with a link to the governance file.