Update new 1.10 branch with site config

[Bradamant3]

Some values are temporary (partly to test netlify config); will change at release time.
Apologies for the stray commits -- checked log, not sure what happened, but hope it's a small enough list we can live with it. Thanks!

/assign @zacharysarah

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[zacharysarah]

@Bradamant3 👋 For the stray commits, I'm asking that you please separate them into different PRs. The changes to _config.yml represent a significant change to the repo's release structure. In case we have to revert and/or cherry-pick PRs for the release (it happens), it's better if we can minimize potential conflicts.

I know it's less than ideal from an efficiency standpoint to pick apart two nits. They both look good otherwise. 💛 😅

[Bradamant3]

Closing in favor of a cleaner PR for just the changes to _config.yml