Adding a few tools to make manual validation easier

[henryiii]

Helps with #115.

[codecov]

Codecov Report

Merging #119 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #119   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          11     11           
  Lines        1643   1647    +4     
=====================================
+ Hits         1643   1647    +4

Impacted Files	Coverage Δ
include/CLI/Option.hpp	100% <100%> (ø)	⬆️
include/CLI/App.hpp	100% <100%> (ø)	⬆️

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