An initial fstream implementation

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[codecov[bot]]

Codecov Report

Patch coverage: 58.99% and project coverage change: -3.71 :warning:

Comparison is base (790da30) 85.04% compared to head (a84ca85) 81.34%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #137      +/-   ##
==========================================
- Coverage   85.04%   81.34%   -3.71%     
==========================================
  Files          44       48       +4     
  Lines        2046     2385     +339     
==========================================
+ Hits         1740     1940     +200     
- Misses        267      400     +133     
- Partials       39       45       +6     

Impacted Files	Coverage Δ
fstream/fstream.go	55.02% <55.02%> (ø)
fstream/lengthy.go	56.45% <56.45%> (ø)
fstream/construct.go	66.66% <66.66%> (ø)
fstream/execution.go	74.19% <74.19%> (ø)

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