feat: support export of system default settings

[isc-tleavitt]

Fixes #544

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.

Project coverage is 29.79%. Comparing base (daae595) to head (c4c351e).
Report is 18 commits behind head on main.

Files with missing lines	Patch %	Lines
cls/SourceControl/Git/Utils.cls	0.00%	5 Missing ⚠️
cls/SourceControl/Git/Extension.cls	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #561      +/-   ##
==========================================
+ Coverage   25.15%   29.79%   +4.64%     
==========================================
  Files          18       18              
  Lines        2648     3514     +866     
==========================================
+ Hits          666     1047     +381     
- Misses       1982     2467     +485     

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