Add composite analyzer to test all analyzers

[rjmurillo]

Adds new type CompositeAnalyzer that inherits from DiagnosticAnalyzer. This new analyzer uses reflection to load all types in the Moq.Analyzers assembly that derive from DiagnosticAnalyzer, are not abstract, and are classes.

The intended use is for diagnostic purposes

using Verifier = Moq.Analyzers.Test.Helpers.AnalyzerVerifier<Moq.Analyzers.Test.CompositeAnalyzer>;

namespace Moq.Analyzers.Test;

public class FooAnalyzerTests
{
    public static IEnumerable<object[]> TestData()
    {
        return new object[][]
        {
            ["""new Mock<TestClass>(MockBehavior.Strict).Object.TaskAsync();"""],
        }.WithNamespaces().WithReferenceAssemblyGroups();
    }

    [Theory]
    [MemberData(nameof(TestData))]
    public async Task Bar(string referenceAssemblyGroup, string @namespace, string mock)
    {
        await Verifier.VerifyAnalyzerAsync(
            $$"""
              {{@namespace}}

              public class TestClass
              {
                  public virtual Task TaskAsync() => Task.CompletedTask;
              }

              internal class UnitTest
              {
                  private void Test()
                  {
                      {{mock}}
                  }
              }
              """,
            referenceAssemblyGroup);
    }
}

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00% (target: -1.00%)	✅ ∅ (target: 95.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (9b41015)	460	425	92.39%
Head commit (8e7511c)	460 (+0)	425 (+0)	92.39% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#128)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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