Step-by-step process for configuring remotes

[isc-pbarton]

Documents multiple different options for configuring authentication to a remote repository with Embedded Git.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.44%. Comparing base (b1b301c) to head (eba988f).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #932      +/-   ##
==========================================
+ Coverage   51.02%   56.44%   +5.41%     
==========================================
  Files          23       23              
  Lines        3112     3880     +768     
==========================================
+ Hits         1588     2190     +602     
- Misses       1524     1690     +166     

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