SSR support example and docs

[marcin-piela]

Closes #21

[codecov-io]

Codecov Report

Merging #23 into master will increase coverage by 2.45%.
The diff coverage is 96.42%.

@@            Coverage Diff             @@
##           master      #23      +/-   ##
==========================================
+ Coverage   96.59%   99.04%   +2.45%     
==========================================
  Files           7        9       +2     
  Lines          88      105      +17     
  Branches        7       10       +3     
==========================================
+ Hits           85      104      +19     
+ Misses          3        1       -2

Impacted Files	Coverage Δ
src/client/client.ts	100% <100%> (+13.63%)	⬆️
src/hooks/useCachedResponse/useCachedResponse.ts	100% <100%> (ø)
src/context/clientContextProvider.tsx	100% <100%> (ø)	⬆️
src/hooks/useQuery/useQuery.ts	100% <100%> (ø)	⬆️
src/cache/cache.ts	100% <100%> (ø)	⬆️
src/hooks/useClient/useClient.ts	75% <75%> (ø)

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