Create request caching service

[ethan-tbd]

This request caching service will be used to:

1. make requests to url
2. return cached data for url
3. request new data from backend at url
4. update cache for url

callers of this will get two responses, like a stream of data where the first response is the cached response and the second response is the network response

perhaps using this as a custom hook similar to https://tanstack.com/query/latest