Introduce Maintainers File

This commit introduces the MAINTAINERS.md file in an effort
to decouple project maintainer status from approval and lgtm
permissions relied on by the project automated continuous
integration tooling.

Signed-off-by: Alexander Greene <[email protected]>

Author: awgreene

MAINTAINERS.md

@@ -0,0 +1,12 @@
+This page lists all active maintainers of this repository.
+
+See [CONTRIBUTING.md](https://github.com/operator-framework/operator-lifecycle-manager/blob/master/CONTRIBUTING.md)
+for general contribution guidelines.
+
+## Maintainers (in alphabetical order)
+  
+- [Evan Cordell](github.com/ecordell), Authzed
+- [Nick Hale](github.com/njhale), Red Hat
+- [Kevin Rizza](github.com/kevinrizza), Red Hat
+- [Alexander Greene](github.com/awgreene), Red Hat
+- [Vu Dinh](github.com/dinhxuanvu), Red Hat