Conflict of Interest policy

We should have a policy that describes when conflicts of interest exist. This could include the more formal concept of financial conflicts of interest, as well as looser guidelines for things like "A CoCo member should abstain on an APE vote if they are a co-author".

cc @crawfordsm as current Ombudsperson

No file, test, or entry point is named. Start by reviewing the repository’s policy documents and the issue’s examples, then clarify the scope with the Ombudsperson; done means a settled policy covering financial conflicts and abstention guidance for CoCo members.

Written by the indexing model from the issue text.