Context

Add documentation on our usage of conda-forge, including adding support for new libraries and maintaining our existing feedstocks.
This should go in the Team Practices Guide and the Greener build duties.

We should call out:

• Adding a new recipe.
• The test scripts in the feedstocks
• The pyarrow version handling in the pymongoarrow feedstock
• Usage of the auto-merge label and the bot
• Adding maintainers.

We should add the whole team to each feedstock to enable the greener build person to manage the PRs.

Definition of done

Add the section to the guide.

Pitfalls

None