[WIP] feat!: introduce hook for invalidating reads

[achou11]

Closes #19

proof of concept for how to expose an invalidation helper for reads. i've implemented a useInvalidateRead() hook that accepts a "path" (a unix path-like string) and relevant parameters based on the path. This will mostly be used in cases where something external to core is updated and affects core (a good example is the custom map file import).

function Screen() {
  const importFileMutation = useMutation(...)
  const invalidateRead = useInvalidateRead()
  
  return (
    <Button 
      onPress={() => { 
        importFileMutation.mutate(undefined, {
          onSuccess: () => {
            // Invalidate maps-related queries after file import
            invalidateRead('/maps', undefined)
          }
        })
        
      }}
    >Import file</Button>
  )
}

As of now, the API may be a bit clunky based on preferences. Open to reconsidering.

TODO:

• finalize API
• write tests