* Introduce "RequestManager"
* Use "RequestManager" - Simple replacements
- Get rid of all "util/client" imports
- replace old requests with new "RequestManager"
- remove "fetcher" from global SWR config
instead of using the SWR hooks by themselves, the "requestManager" is supposed to be used
* Use "RequestManager" - Do requests via SWR hooks
Use SWR hooks at places where it's easily usable
* Prevent trailing slashes in the "baseUrl"
