docs: add csharpier linting docs

[latonz]

No description provided.

[codecov]

Codecov Report

Merging #471 (d5bb23e) into main (b17f666) will increase coverage by 0.38%.
The diff coverage is 96.29%.

@@            Coverage Diff             @@
##             main     #471      +/-   ##
==========================================
+ Coverage   92.08%   92.46%   +0.38%     
==========================================
  Files         135      139       +4     
  Lines        4282     4434     +152     
  Branches      591      611      +20     
==========================================
+ Hits         3943     4100     +157     
+ Misses        225      221       -4     
+ Partials      114      113       -1     

Impacted Files	Coverage Δ
...scriptors/InlineExpressionMappingBuilderContext.cs	95.12% <ø> (ø)
...appingBodyBuilders/UserMethodMappingBodyBuilder.cs	90.47% <ø> (ø)
...Riok.Mapperly/Descriptors/MappingBuilderContext.cs	98.14% <ø> (ø)
...erly/Descriptors/MappingBuilders/MappingBuilder.cs	100.00% <ø> (ø)
src/Riok.Mapperly/Descriptors/MappingCollection.cs	100.00% <ø> (ø)
...iok.Mapperly/Descriptors/Mappings/MethodMapping.cs	95.00% <ø> (ø)
...Mappings/UserDefinedExistingTargetMethodMapping.cs	87.17% <ø> (ø)
...serMappings/UserDefinedNewInstanceMethodMapping.cs	100.00% <ø> (ø)
...pings/UserMappings/UserImplementedMethodMapping.cs	90.90% <ø> (ø)
.../Riok.Mapperly/Helpers/NullableSymbolExtensions.cs	95.00% <81.81%> (+2.40%)	⬆️
... and 20 more

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[github-actions]

🎉 This PR is included in version 2.9.0-next.2 🎉

The release is available on:

• GitHub release
• v2.9.0-next.2

Your semantic-release bot 📦🚀

[github-actions]

🎉 This PR is included in version 3.0.0 🎉

The release is available on:

• GitHub release
• v3.0.0

Your semantic-release bot 📦🚀