Issue/73 add common code used by clients

[stazz]

No description provided.

[codecov]

Codecov Report

Merging #74 (d03d69f) into main (9345025) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              main       #74    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files           14        15     +1     
  Lines         1592      1743   +151     
  Branches       127       145    +18     
==========================================
+ Hits          1592      1743   +151     

Flag	Coverage Δ
data	100.00% <ø> (ø)
data-backend	100.00% <100.00%> (ø)
data-frontend	100.00% <100.00%> (ø)
protocol	100.00% <ø> (ø)

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Files Changed	Coverage Δ
code/data-backend/src/errors.ts	100.00% <ø> (ø)
code/data-backend/src/request-body.ts	100.00% <ø> (ø)
code/data-backend/src/response-body.ts	100.00% <ø> (ø)
code/data-backend/src/string.ts	100.00% <ø> (ø)
code/data-backend/src/url.ts	100.00% <ø> (ø)
code/data-frontend/src/errors.ts	100.00% <ø> (ø)
code/data-frontend/src/url.ts	100.00% <ø> (ø)
code/data/src/methods.ts	100.00% <ø> (ø)
code/data/src/url.ts	100.00% <ø> (ø)
code/data/src/utils.ts	100.00% <ø> (ø)
... and 5 more