Adding setters and getters related to help

[henryiii]

This adds utilities to App to make custom conversion to printout formats easier:

• get_options: The original list of options added to the app
• get_description: The description attached to the app
• set_name: Set the app name
• Apps now support a name after the description - if the name is set, use that instead of argv[0] for the app name

[codecov]

Codecov Report

Merging #105 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #105   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           9      9           
  Lines        1407   1418   +11     
=====================================
+ Hits         1407   1418   +11

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

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