Add MAINTAINERS.md file

Signed-off-by: Juan Estrella <juan.estrella@finos.org>

MAINTAINERS.md

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+# Maintainers
+
+This file lists the maintainers of this repository.
+
+## Current maintainers
+
+| GitHub Username | Name | Organization | Email |
+|----------------|------|--------------|-------|
+| @KiranNiranjan | Kiran Niranjan | KiKe | *please add email* |
+| @NguyenTranHoangSym | *please add name* | *please add organization* | *please add email* |
+| @apicolet-symphony | Antoine Picolet | Symphony | *please add email* |
+| @keerthi16 | Keerthi Niranjan | KiKe | keerthiniranjan16@gmail.com |
+| @mmaio-symphony | *please add name* | *please add organization* | *please add email* |
+| @sbenmoussati | Salah Benmoussati | *please add organization* | *please add email* |
+| @symphony-crowdin | Symphony Crowdin | @SymphonyOSF | *please add email* |
+
+For information about maintainer responsibilities and resources, see the [FINOS Maintainers Cheatsheet](https://community.finos.org/docs/finos-maintainers-cheatsheet).
+
+## Updating this file
+
+All changes to the maintainer list are managed openly:
+
+- **Submit a Pull Request** to this file for any addition, removal, or update.
+- **If your project's governance requires a vote**, document or link to the vote outcome in the PR description or comments.
+- This process creates a public audit trail of project leadership over time.
+
+Please email **help@finos.org** whenever this file is updated with a change to maintainership.