Support KeePass2 TOTP settings

[droidmonkey]

• Fixes Support KeePass2 TOTP configuration settings #7263
• Also improves handling of custom TOTP settings

Screenshots

Testing strategy

Added unit tests

Type of change

• ✅ New feature (change that adds functionality)

[codecov]

Codecov Report

Attention: Patch coverage is 93.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 63.00%. Comparing base (2f01604) to head (4c882df).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/core/Totp.cpp	91.30%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #11229      +/-   ##
===========================================
+ Coverage    62.98%   63.00%   +0.02%     
===========================================
  Files          362      362              
  Lines        37766    37783      +17     
===========================================
+ Hits         23785    23803      +18     
+ Misses       13981    13980       -1     

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