create MAINTAINERS.md (#239)

Author: matheusfm

MAINTAINERS.md

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+# Maintainers
+
+Maintainers are approvers who have shown good technical judgement in guiding feature design & development, have 
+displayed overall knowledge of the project and features in the project, and are nurturing and receptive to everyone in 
+the community.
+
+The following table lists the Zora project core maintainers:
+
+| Name                                                              | GitHub ID                                  | Affiliation                |
+|-------------------------------------------------------------------|--------------------------------------------|----------------------------|
+| [Matheus Moraes](https://www.linkedin.com/in/matheusfm/)          | [@matheusfm](https://github.com/matheusfm) | [Getup](https://getup.io/) |
+| [Kevin Conner](https://www.linkedin.com/in/kevin-conner-26b5554/) | [@knrc](https://github.com/knrc)           | [Getup](https://getup.io/) |