Migrate from fetch to react-query

[FKolwa]

As discussed in PR #81 we decided to move from simple fetch calls to retrieve our static cloud image data to react-query.
React Query is not only transport protocol agnostic, which means we can continue to use it even if we decide to change our back-end implementation, it also brings features like caching, paginated fetch calls and suspended rendering which will be helpful in boosting our page performance.