Add MAINTAINERS.md file

[TheJuanAndOnly99]

This PR adds a MAINTAINERS.md file to the root of this repository as part of a FINOS-wide effort to standardize maintainer signaling across all FINOS projects. An announcement was sent to community@finos.org with the full context, see announcement email here.

How this list was generated

The maintainers were determined from this repository's GitHub settings:

• Users with maintain or admin role on the repository
• Members of teams with maintain or admin permission

Each entry includes the GitHub username, name, organization, and email pulled from the user's public GitHub profile. Where any field is missing on the profile, a *please add ...* placeholder marks where to fill in the value.

If no maintainers were detected automatically (e.g. your repo has no users or teams with maintain/admin role), the table is intentionally empty. Please populate it manually on this branch before merging and email help@finos.org.

What we need from this project's maintainers

1. Review the list for completeness and accuracy.
2. Update any incorrect or placeholder values (names, organization, email) directly on this branch.
3. Add anyone missing, edit the file in this PR if a maintainer was not automatically detected.
4. Merge when the list is accurate.

If your project does not need a MAINTAINERS.md for any reason, just close this PR and let us know at help@finos.org.
If you already have a MAINTAINERS.md file, you can close this PR. Please update your existing file if needed and place it in the root of the repository.

Going forward: keeping the list current

To keep maintainer changes transparent and aligned with open governance:

• Any change to the maintainer list must be made via a PR to this file.
• If your project's governance requires a vote, document or link to the vote outcome in the PR description or comments.
• This gives the community a public audit trail of project leadership over time.

If you have any questions about the format or process, please email help@finos.org.

Thank you for your review!