Refactor string and output methods out of WizardImplementation.cs

[guimafelipe]

Summary

• Extracts CreateErrorMessage, CreateDetailedErrorMessage, LogError, and ShowLocalizationErrorDialog into new WizardErrorHelper.cs static utility class
• WizardImplementation.cs now delegates to the helper, reducing its size and improving maintainability
• No behavior changes

Fixes #6017

[Copilot]

Pull request overview

This PR refactors error handling code from WizardImplementation.cs into a new WizardErrorHelper.cs static utility class to improve maintainability and reduce the size of the wizard implementation. The refactoring extracts four methods: CreateErrorMessage, CreateDetailedErrorMessage, LogError, and ShowLocalizationErrorDialog.

Changes:

• Created new WizardErrorHelper.cs with static utility methods for error handling
• Modified WizardImplementation.cs to delegate error handling to the new helper class
• Changed logging source identifier from instance ToString() to nameof(NuGetPackageInstaller)

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
dev/VSIX/Shared/WizardImplementation.cs	Removed error handling method implementations and replaced with delegation calls to WizardErrorHelper
dev/VSIX/Shared/WizardErrorHelper.cs	New static utility class containing extracted error handling methods

[Copilot]

The source parameter changed from ToString() (which would return the fully qualified type name like "WindowsAppSDK.TemplateUtilities.NuGetPackageInstaller") to nameof(NuGetPackageInstaller) (which returns just "NuGetPackageInstaller"). This changes the log entry source and could affect log filtering or searching. Consider using typeof(NuGetPackageInstaller).FullName to preserve the original behavior, or document this as an intentional change in the PR description.

Suggested change

	log.LogEntry((uint)__ACTIVITYLOG_ENTRYTYPE.ALE_ERROR, nameof(NuGetPackageInstaller), message);
	log.LogEntry((uint)__ACTIVITYLOG_ENTRYTYPE.ALE_ERROR, typeof(NuGetPackageInstaller).FullName, message);