feat: Organizations API and Users API

[vlastahajek]

Closes #97 and #98

Added basic support calling Organizations API and Users API.

Organization API doesn't handle secrets and labels yet, Users API doesn't handle logs

• CHANGELOG.md updated
• Rebased/mergeable
• Tests pass

[codecov-io]

Codecov Report

Merging #99 into master will increase coverage by 1.62%.
The diff coverage is 91.30%.

@@            Coverage Diff             @@
##           master      #99      +/-   ##
==========================================
+ Coverage   82.09%   83.72%   +1.62%     
==========================================
  Files          11       11              
  Lines         810      768      -42     
==========================================
- Hits          665      643      -22     
+ Misses         99       86      -13     
+ Partials       46       39       -7     

Impacted Files	Coverage Δ
setup.go	72.22% <66.66%> (-2.78%)	⬇️
writeService.go	77.67% <80.00%> (-1.23%)	⬇️
client.go	93.10% <94.28%> (+17.37%)	⬆️
query.go	74.87% <100.00%> (+0.66%)	⬆️
version.go	100.00% <100.00%> (ø)
write.go	94.06% <100.00%> (+2.54%)	⬆️
writeApiBlocking.go	82.60% <100.00%> (ø)
options.go	70.21% <0.00%> (-4.26%)	⬇️

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