Update project dependencies and add NuGet update scripts for improved package management

[stesee]

No description provided.

[Copilot]

Pull Request Overview

This PR updates project dependencies to their latest versions and adds Windows PowerShell support for NuGet package management alongside the existing Unix shell script.

• Updates several NuGet packages including NUnit, SonarAnalyzer, and Microsoft.NET.Test.Sdk to newer versions
• Adds a PowerShell script for Windows users to update NuGet packages automatically
• Enhances VS Code task configuration and recommended extensions for better development workflow

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
ImageSharpCompareTestNunit/ImageSharpCompareTestNunit.csproj	Updates test-related NuGet packages to latest stable versions
ImageSharpCompare/ImageSharpCompare.csproj	Updates SonarAnalyzer.CSharp to match version used in test project
.vscode/updateNuget.ps1	Adds new PowerShell script for Windows-based NuGet package updates
.vscode/tasks.json	Adds VS Code task to run the new PowerShell update script
.vscode/extensions.json	Adds task explorer extension recommendation

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[Copilot]

The hardcoded path to dotnet.exe may not work on all Windows systems where .NET is installed in a different location. Consider using dotnet directly since it should be in the PATH, or use Get-Command to locate the executable dynamically.

Suggested change

	& "C:\Program Files\dotnet\dotnet.exe" add "$projFile" package "$packageName"
	dotnet add "$projFile" package "$packageName"