Missing MAINTAINERS.md

[ghost]

Is this a regression?

No

Description

As part of Hyperledger - we MUST have a MAINTAINERS.md file (as per https://toc.hyperledger.org/guidelines/MAINTAINERS-guidelines.html)

The repository is currently missing this file, we must create this file and populate according to the expecations defined in the guidelines

Some content may already be defined in other files in the repositor (from CONTRIBUTING.md)

Please provide the exception or error you saw

N/A

Please provide the environment you discovered this bug in

N/A

Anything else?

No response

[essbante-io]

I added the info of current maintainers to the PR