Updating the workflow console app example program to allow for CTRL+C to properly terminate the program, and Readme updates

[RyanLettieri]

Description

Added in logic to properly catch a CTRL+C termination input from the user to shutdown the workflow console app example.

Updated Readme

Issue reference

This PR will close: #[1189] #[1191]

**Note that the issue of 1189 will not fully be resolved until microsoft/durabletask-dotnet#249 is resolved.

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1cb0052) 66.53% compared to head (15aead9) 66.53%.
Report is 1 commits behind head on master.

❗ Current head 15aead9 differs from pull request most recent head 2d04263. Consider uploading reports for the commit 2d04263 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1194   +/-   ##
=======================================
  Coverage   66.53%   66.53%           
=======================================
  Files         171      171           
  Lines        5752     5752           
  Branches      626      626           
=======================================
  Hits         3827     3827           
  Misses       1776     1776           
  Partials      149      149           

Flag	Coverage Δ
net6	66.52% <ø> (ø)
net7	66.52% <ø> (ø)
net8	66.52% <ø> (ø)

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