Add support for generating multiples using Microsoft Kiota

[christianhelle]

PR Classification

This pull request introduces a new feature that allows Kiota to generate multiple files and provides a UI for setting Kiota options in Visual Studio.

PR Summary

This PR enhances the Kiota code generation process by adding support for multiple file generation and user-specified options.

• Updated KiotaCommand and KiotaCodeGenerator to handle multiple file generation.
• Added DefaultKiotaOptions and KiotaOptions classes for default and user-specified Kiota options.
• Introduced KiotaOptionsPage for setting Kiota options in Visual Studio.
• Modified KiotaCodeGeneratorFixture, CodeGeneratorFactory, and VsPackage classes to accommodate the new options handling.
• Updated ApiClientCodeGen.VSIX.Shared.projitems to include the new Kiota options classes.

Screenshots

[sonarcloud[bot]]

Quality Gate failed

Failed conditions
57.9% Coverage on New Code (required ≥ 80%)

See analysis details on SonarCloud