Sneaky update to include a warning when appdiff doesn't find diff apps

Get-PC/Private/AppDiff.ps1

@@ -49,6 +49,8 @@ function Get-AppDiff {
     }
     Write-Progress -Activity "Filtering out standard apps from $pc" -Status "Checking $app" -PercentComplete (($appi * 90 / $apps.Length) + 10) -ParentId 1
 
+    if ($output.Length -eq 0) { Write-Warning "No non-standard apps found" }
+    
     if($TableView){
         $output | Out-GridView -Title "Get-PC Apps - $pc"
     }

Get-PC/patchnotes.txt

@@ -5,6 +5,7 @@ Patch 2025-4-29
 -Update Apps can now find sneaky apps like GSL Will Call and OBIX by looking for a path specified in SHSApps.json
 -Fix InstallNet35 now works 
 -Fix Apps reports readable versions now
+-Add Warning when appdiff finds nothing (to distiguish it from a silent failure)
 
 Patch 2025-4-15
 -Update Added Visage to the AppDiff ignore list