* 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"
* Update SWR to version 2.1.5
* Improve generic type names
* Use "isLoading" property of "useSWR" response
* Correctly load library without selected tab
With the latest SWR version the library was empty on the first load.
Not sure what exactly is the reason, but due to "isPaused" the request wasn't sent even after "activeTab" wasn't undefined anymore.
Instead of using "isPaused", passing "null" as the key will also prevent SWR from doing the request.
