feat: C#12 primary constructors support

[latonz]

Support C#12 primary constructors

Description

Adds support for C#12 primary constructors.
Depends on #718. Probably await .NET 8.0 RC1.

Fixes #684

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

Merging #720 (2221c03) into main (c2f1f4f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #720   +/-   ##
=======================================
  Coverage   91.30%   91.30%           
=======================================
  Files         201      201           
  Lines        6628     6628           
  Branches      821      821           
=======================================
  Hits         6052     6052           
  Misses        387      387           
  Partials      189      189           

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[github-actions]

🎉 This PR is included in version 3.2.0 🎉

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• v3.2.0

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