Do not register types as IDisposable or IAsyncDisposable when AsImplementedInterfaces used

[Dreamescaper]

Fixes #26 .

[Copilot]

Pull Request Overview

This PR updates the source generator to exclude IDisposable and IAsyncDisposable when using AsImplementedInterfaces. Key changes include:

• Making the Namespace property nullable and updating GetModifiers to accept null.
• Filtering out IDisposable and IAsyncDisposable from implemented interfaces and updating the corresponding test.
• Minor refactoring in obtaining assembly references and marking singleton instances as readonly.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
ServiceScan.SourceGenerator/Model/MethodModel.cs	Updated nullable Namespace and GetModifiers parameter signature.
ServiceScan.SourceGenerator/DependencyInjectionGenerator.ParseMethodModel.cs	Changed return type to nullable for better error handling.
ServiceScan.SourceGenerator/DependencyInjectionGenerator.FindServicesToRegister.cs	Introduced filtering for IDisposable/IAsyncDisposable and helper methods.
ServiceScan.SourceGenerator/DependencyInjectionGenerator.FilterTypes.cs	Refactored assembly lookup using a nullable intermediate variable.
ServiceScan.SourceGenerator/CombinedProviderComparer.cs	Updated singleton Instance to be readonly.
ServiceScan.SourceGenerator.Tests/AddServicesTests.cs	Added test to verify that IDisposable interfaces are excluded.
.editorconfig	Updated var style preferences.

Comments suppressed due to low confidence (1)

ServiceScan.SourceGenerator.Tests/AddServicesTests.cs:804

• [nitpick] Consider renaming the test method 'IDisposableServiceAreExcludedWithImplementedInterfaces' to a grammatically consistent plural form, such as 'IDisposableServicesAreExcludedWithImplementedInterfaces', for improved clarity.

public void IDisposableServiceAreExcludedWithImplementedInterfaces()