Expand coverage report explanation to better understand how coverage and coverage completeness values were calculated

[northwestwitch]

Closes #325. I have reasoned that tooltips might be useful on the web report, but would disappear if the report is exported to PDF. This way the explanation id downloaded with the page

Description

Added/Changed/Fixed

• Expanded the stats explanation on the coverage report

How to test

• Deploy locally or or stage

Expected outcome

• New explanation should be shown

Review

• Tests executed by CR
• "Merge and deploy" approved by Jakob37

This version is a

• MAJOR - when you make incompatible API changes
• MINOR - when you add functionality in a backwards compatible manner
• PATCH - when you make backwards compatible bug fixes or documentation/instructions

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.50%. Comparing base (4c8ac1b) to head (7fa19a5).
Report is 42 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #327      +/-   ##
==========================================
+ Coverage   94.40%   94.50%   +0.09%     
==========================================
  Files          35       36       +1     
  Lines        2002     2037      +35     
==========================================
+ Hits         1890     1925      +35     
  Misses        112      112              

Flag	Coverage Δ
unittests	94.50% <ø> (+0.09%)	⬆️

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[Jakob37]

Nice! On holiday this week, back in office next

[northwestwitch]

Nice! On holiday this week, back in office next

Sure, no rush, enjoy! 🌴

[Jakob37]

Looks good and clear. Nice 👌

Makes sense as you say to make sure it is included in the exported PDF.