Add notification that containers and volumes will be removed by default

Co-authored-by: ntrappe-msft <124631722+ntrappe-msft@users.noreply.github.com>

Author: Copilot

helpful_tools/Install-DockerCE/uninstall-docker-ce.ps1

@@ -548,6 +548,7 @@ Remove-DockerCE()
 
     # Show what will be removed
     Write-Output "The following actions will be performed:"
+    Write-Output "- Stop and remove all Docker containers and volumes"
     Write-Output "- Stop and remove Docker service"
     Write-Output "- Remove Docker binaries from System32"