Offline once and for all

[michalstruck]

Sort out the offline question. Thorough research about ins and outs of the persistQueryClient, how to handle resuming mutations (and default mutation functions), how to handle offline refetches. Consider centralizing all the query keys in a single file, like here: https://codesandbox.io/p/devbox/tanstack-query-example-react-offline-mmcnvh?file=%2Fsrc%2Fmovies.js%3A16%2C41

Check if cached mutations can be discarded on requery, based on difference from cache (as in, quantity in cache != incoming quantity, cancel mutation)

[michalstruck]

this looks promising https://github.com/kapobajza/React_Native_Offline_first_sample