Add scheduling guide to documentation

[astrobot-houston]

Originally proposed by @mhart in #246. Their description is reproduced verbatim below.

All community-submitted pull requests are automatically converted to issues (bugs) & discussions (feature requests, enhancements) where they can be triaged and prioritized. Once prioritized, a PR implementation is created automatically.

Pushing this up, still reviewing

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Original implementation from #246 by @mhart