V1.4 bugfixes

[billyhoce]

Mostly contains changes to the DG, some small changes in UG and code as well

• Ensure the 'Acknowledgements' section is accurate
• Appendix: Instructions for Manual Testing (Cover all user-testable features)
• Appendix: Effort
• Appendix: Requirements
• Appendix: Planned Enhancements

Good to haves:

• Add activity diagram

Close #180
Close #169
Close #147
Close #140
Close #137
Close #127
Close #121

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.08%. Comparing base (5f1c4ad) to head (b1b5bbc).

❗ Current head b1b5bbc differs from pull request most recent head f15c777. Consider uploading reports for the commit f15c777 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #185   +/-   ##
=========================================
  Coverage     83.08%   83.08%           
  Complexity      641      641           
=========================================
  Files            90       90           
  Lines          1898     1898           
  Branches        216      216           
=========================================
  Hits           1577     1577           
  Misses          257      257           
  Partials         64       64           

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[kinjalagarwal1810]

LGTM