[WIP] [Experiment] Refactor Subscribable and NotifyManager to TanStack Store

[crutchcorn]

This PR refactors the existing implementations of NotifyManager and Subscribable instances into TanStack Store utilities as an experiment to see if we're able to consolidate on the tooling we want to use for our projects.

This is a WIP and experiment; this may not ultimately yield any changes to Query.

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1 Ignored Deployment

Name	Status	Preview	Updated (UTC)
query	⬜️ Ignored (Inspect)		Jan 31, 2024 9:54am

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[TkDodo]

looks good, but the failing tests uses the focusManager, so I think we'd need to look into this

[TkDodo]

looking at the preview build, onlineManager seems to work fine, but focusManager does not - I can't get window focus refetching to work.