feat: Add option to specify the string format of a property

[latonz]

String format for property mappings

Description

Adds a StringFormat property to the MapPropertyAttribute to specify the format of the to string conversion.
Use the TypeMappingKey to resolve mappings (including the configuration (for now only the string format)) instead of only the source and target type to allow the same type conversion with different configurations.

Partially implements #887

Checklist

• The existing code style is followed
• The commit message follows our guidelines
• Performed a self-review of my code
• Hard-to-understand areas of my code are commented
• The documentation is updated (as applicable)
• Unit tests are added/updated
• Integration tests are added/updated (as applicable, especially if feature/bug depends on roslyn or framework version in use)

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (1f6f1f5) 91.50% compared to head (8280aaf) 91.53%.

Files	Patch %	Lines
...Riok.Mapperly.Abstractions/MapPropertyAttribute.cs	0.00%	1 Missing ⚠️
...criptors/MappingBuilders/NullableMappingBuilder.cs	92.30%	0 Missing and 1 partial ⚠️
src/Riok.Mapperly/Descriptors/MappingCollection.cs	90.00%	0 Missing and 1 partial ⚠️
src/Riok.Mapperly/Helpers/SymbolExtensions.cs	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #921      +/-   ##
==========================================
+ Coverage   91.50%   91.53%   +0.03%     
==========================================
  Files         215      217       +2     
  Lines        7216     7269      +53     
  Branches      873      879       +6     
==========================================
+ Hits         6603     6654      +51     
- Misses        407      408       +1     
- Partials      206      207       +1     

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[latonz]

Switched to a IFormattable based implementation. This also allows simpler support for IFormatProvider, see #929

[github-actions]

🎉 This PR is included in version 3.3.0-next.4 🎉

The release is available on:

• GitHub release
• v3.3.0-next.4

Your semantic-release bot 📦🚀

[github-actions]

🎉 This PR is included in version 3.3.0 🎉

The release is available on:

• GitHub release
• v3.3.0

Your semantic-release bot 📦🚀