Add configuration option to allow OfT suffix for generic types with any arity

[Copilot]

• Add a new configuration option MA0048.allow_oft_for_all_generic_types to support OfT suffix for generic types with any arity
• Update the analyzer logic to check this configuration option
• Add tests for the new configuration option (arity > 1 cases)
• Update the documentation file to describe the new configuration option
• Run documentation generator to update markdown files
• Run code review and address feedback
• Run CodeQL security check (no issues found)
• Validate all builds and tests pass (2748 tests passed)
• Fix test compatibility with Roslyn 3.8 by making record struct test conditional on C# 11

Original prompt

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This section details on the original issue you should resolve

<issue_title>MA0048: Accept OfT also for classes with arity > 1</issue_title>
<issue_description>We have the convention to name files for generic classes with suffix OfT, independent of the number of generic parameters.

The following file raises an MA0048 diagnostic if named FooOfT.cs:

public record struct Foo<T1, T2>(T1 Key, T2 Value);

Would be nice, if this would also be accepted by the rule.</issue_description>

<agent_instructions>Can you enable this behind a configuration option?</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes MA0048: Accept OfT also for classes with arity > 1 #1002

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[meziantou]

@copilot One test fails on Roslyn 3.8. Can you make the test conditional based on the C# version?

[xUnit.net 00:00:59.52]     Meziantou.Analyzer.Test.Rules.FileNameMustMatchTypeNameAnalyzerTests.DoesMatchFileName_RecordStructWithArityGreaterThan1UsingOfT_WithConfiguration [FAIL]
[xUnit.net 00:00:59.52]       The code doesn't compile.
[xUnit.net 00:00:59.52]       
[xUnit.net 00:00:59.52]       public record struct Foo<T1, T2>(T1 Key, T2 Value);              ^^^^^^ CS1001: Identifier expected
[xUnit.net 00:00:59.52]                     ^^^^^^ CS1514: { expected
[xUnit.net 00:00:59.52]                     ^^^^^^ CS1513: } expected
[xUnit.net 00:00:59.52]                                       ^ CS1514: { expected
[xUnit.net 00:00:59.52]                                       ^ CS1513: } expected
[xUnit.net 00:00:59.52]                                       ^^^^^^^^^^^^^^^^^^^ CS8803: Top-level statements must precede namespace and type declarations.
[xUnit.net 00:00:59.52]                                       ^^^^^^^^^^^^^^^^^^ CS0201: Only assignment, call, increment, decrement, await, and new object expressions can be used as a statement
[xUnit.net 00:00:59.52]                                        ^^ CS0246: The type or namespace name 'T1' could not be found (are you missing a using directive or an assembly reference?)
[xUnit.net 00:00:59.53]                                        ^^^^^^ CS8185: A declaration is not allowed in this context.
[xUnit.net 00:00:59.53]                                                ^^ CS0246: The type or namespace name 'T2' could not be found (are you missing a using directive or an assembly reference?)
[xUnit.net 00:00:59.53]                                                ^^^^^^^^ CS8185: A declaration is not allowed in this context.
[xUnit.net 00:00:59.53]       
[xUnit.net 00:00:59.53]       Stack Trace:
[xUnit.net 00:00:59.53]         /_/tests/Meziantou.Analyzer.Test/Helpers/ProjectBuilder.Validation.cs(310,0): at TestHelper.ProjectBuilder.GetSortedDiagnosticsFromDocuments(IList`1 analyzers, Document[] documents, Boolean compileSolution)
[xUnit.net 00:00:59.53]         /_/tests/Meziantou.Analyzer.Test/Helpers/ProjectBuilder.Validation.cs(142,0): at TestHelper.ProjectBuilder.GetSortedDiagnostics(IList`1 analyzers)
[xUnit.net 00:00:59.53]         /_/tests/Meziantou.Analyzer.Test/Helpers/ProjectBuilder.Validation.cs(52,0): at TestHelper.ProjectBuilder.VerifyDiagnostics(IList`1 analyzers, IList`1 expected)
[xUnit.net 00:00:59.53]         /_/tests/Meziantou.Analyzer.Test/Helpers/ProjectBuilder.Validation.cs(35,0): at TestHelper.ProjectBuilder.ValidateAsync()
[xUnit.net 00:00:59.53]         /_/tests/Meziantou.Analyzer.Test/Rules/FileNameMustMatchTypeNameAnalyzerTests.cs(120,0): at Meziantou.Analyzer.Test.Rules.FileNameMustMatchTypeNameAnalyzerTests.DoesMatchFileName_RecordStructWithArityGreaterThan1UsingOfT_WithConfiguration()
[xUnit.net 00:00:59.53]         --- End of stack trace from previous location ---

[Copilot]

@copilot One test fails on Roslyn 3.8. Can you make the test conditional based on the C# version?

...

Fixed in commit 97cf812. The test is now wrapped in #if CSHARP11_OR_GREATER and includes .WithLanguageVersion(Microsoft.CodeAnalysis.CSharp.LanguageVersion.CSharp11) to ensure it only runs when record struct syntax is supported.