Add docs about project contributors and their roles

docs/contributing/contributors.md

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+# Contributors
+
+There are different ways people can contribute to DAG Factory.
+Learn more about the project [contributors roles](roles.md).
+
+## Committers
+
+* Pankaj Koti ([@pankajkoti](https://github.com/pankajkoti))
+* Pankaj Singh ([@pankajastro](https://github.com/pankajastro))
+* Tatiana Al-Chueyr ([@tatiana](https://github.com/tatiana))
+
+## Emeritus Committers
+
+* Adam Boscarino ([@ajbosco](https://github.com/ajbosco))
+
+## Contributors
+
+Many people are improving DAG Factory each day.
+Find more contributors [in our GitHub page](https://github.com/astronomer/dag-factory/graphs/contributors).

docs/contributing/roles.md

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+# Contributor roles
+
+Contributors are welcome and are greatly appreciated! Every little bit helps, and we give credit to them.
+
+This document aims to explain the current roles in the DAG Factory project.
+For more information, check the contributing docs.
+
+## Contributors
+
+A contributor is anyone who wants to contribute code, documentation, tests, ideas, or anything to the DAG Factory project.
+
+DAG Factory contributors are listed in the Github [insights page](https://github.com/astronomer/dag-factory/graphs/contributors).
+
+Contributors are responsible for:
+
+* Fixing bugs
+* Refactoring code
+* Improving processes and tooling
+* Adding features
+* Improving the documentation
+
+## Committers
+
+Committers are community members with write access to the [DAG Factory GitHub repository](https://github.com/astronomer/dag-factory).
+They can modify the code and the documentation and accept others' contributions to the repo.
+
+Check [contributors](contributors.md) for the official list of DAG Factory committers.
+
+Committers have the same responsibilities as standard contributors and also perform the following actions:
+
+* Reviewing & merging pull-requests
+* Scanning and responding to GitHub issues, helping triaging them
+
+If you know you are not going to be able to contribute for a long time (for instance, due to a change of job or circumstances), you should inform other maintainers, and we will mark you as "emeritus".
+Emeritus committers will no longer have write access to the repo.
+As merit earned never expires, once an emeritus committer becomes active again, they can simply email another maintainer from Astronomer and ask to be reinstated.
+
+### Pre-requisites to becoming a committer
+
+General prerequisites that we look for in all candidates:
+
+1. Consistent contribution over last few months
+2. Visibility on discussions on the Slack channel or GitHub issues/discussions
+3. Contributions to community health and project's sustainability for the long-term
+4. Understands the project's [contributors guidelines](howto.md).
+Astronomer is responsible and accountable for releasing new versions of DAG Factory in [PyPI](https://pypi.org/project/dag-factory/), following the [milestones](https://github.com/astronomer/dag-factory/milestones).
+Astronomer has the right to grant and revoke write access permissions to the project's official repository for any reason it sees fit.