Optimize Windows Defender exclusion script with native PowerShell #2930

Since the script to add an exclusion to Windows Defender seems overly complex, this script replaces the complex LINQ-based exclusion check with a more idiomatic and simpler version PowerShell implementation.

Fixes #2930

Update WindowsDefenderConfigurator.java

@fdcastel, I've updated the script to simplify it as suggested. It now directly uses `Add-MpPreference -ExclusionProcess $pathsToExclude` without the extra conditionals or set creation. Let me know if anything else needs tweaking.
Thanks!
cc @HannesWell

Author: IamLRBA

bundles/org.eclipse.ui.workbench/eclipseui/org/eclipse/ui/internal/WindowsDefenderConfigurator.java

@@ -342,14 +342,12 @@ public static String createAddExclusionsPowershellCommand(String extraSeparator)
 		//
 		// For .NET's stream API called LINQ see:
 		// https://learn.microsoft.com/en-us/dotnet/api/system.linq.enumerable
-		String excludedPaths = paths.stream().map(Path::toString).map(p -> '"' + p + '"')
-				.collect(Collectors.joining(',' + extraSeparator));
-		final String exclusionType = "ExclusionProcess"; //$NON-NLS-1$
-		return String.join(';' + extraSeparator, "$exclusions=@(" + extraSeparator + excludedPaths + ')', //$NON-NLS-1$
-				"$existingExclusions=[Collections.Generic.HashSet[String]](Get-MpPreference)." + exclusionType, //$NON-NLS-1$
-				"if($existingExclusions -eq $null) { $existingExclusions = New-Object Collections.Generic.HashSet[String] }", //$NON-NLS-1$
-				"$exclusionsToAdd=[Linq.Enumerable]::ToArray([Linq.Enumerable]::Where($exclusions,[Func[object,bool]]{param($ex)!$existingExclusions.Contains($ex)}))", //$NON-NLS-1$
-				"if($exclusionsToAdd.Length -gt 0){ Add-MpPreference -" + exclusionType + " $exclusionsToAdd }"); //$NON-NLS-1$ //$NON-NLS-2$
+		String excludedPaths = paths.stream().map(Path::toString).map(p -> "'" + p.replace("'", "''") + "'")
+				.collect(Collectors.joining(','));
+		return String.join(";",
+				"$pathsToExclude = @(" + excludedPaths + ")",
+				"Add-MpPreference -ExclusionProcess $pathsToExclude"
+		);
 	}
 
 	private static void excludeDirectoryFromScanning(IProgressMonitor monitor) throws IOException {