Add user confirmation for PowerShell 7 terminal integration

- Ask user before setting PowerShell 7 as default VSCode terminal
- Make PowerShell terminal setup recommended but optional
- Add separate tracking for terminal integration result
- Update installation summary to show configuration status
- Provide clearer feedback on what was configured

install-prerequisites.ps1

@@ -258,6 +258,7 @@ $results = @{
     Git = $false
     VSCode = $false
     VSCodeExtensions = $false
+    VSCodePowerShellIntegration = $null  # null = not asked, true = configured, false = skipped/failed
     Python = $null  # null = not attempted, true = success, false = failed
     WindowsTerminal = $null
 }
@@ -313,6 +314,14 @@ function Install-VSCodeExtension {
 }
 
 function Set-VSCodePowerShellIntegration {
+    # Ask user if they want to set PowerShell 7 as default terminal
+    $setAsDefault = Get-UserConfirmation "Set PowerShell 7 as the default terminal in VSCode? (Recommended for this workshop)"
+    
+    if (-not $setAsDefault) {
+        Write-Host "  Skipping PowerShell 7 terminal configuration." -ForegroundColor Gray
+        return $false
+    }
+    
     Write-Host "  Configuring PowerShell 7 integration with VSCode..." -ForegroundColor Cyan
     
     try {
@@ -415,8 +424,9 @@ if ($results.VSCode) {
     
     
     
-    # Configure PowerShell 7 integration
+    # Configure PowerShell 7 integration (optional but recommended)
     $powershellIntegrationResult = Set-VSCodePowerShellIntegration
+    $results.VSCodePowerShellIntegration = $powershellIntegrationResult
     
     $results.VSCodeExtensions = $powershellExtensionResult
 }
@@ -491,11 +501,17 @@ if ($results.VSCode) {
     
     if ($results.VSCodeExtensions) {
         Write-Success "  • PowerShell extension"
-        Write-Success "  • PowerShell 7 terminal integration"
     }
     else {
         Write-Warning "  • VSCode PowerShell extension may need manual installation"
     }
+    
+    if ($results.VSCodePowerShellIntegration -eq $true) {
+        Write-Success "  • PowerShell 7 terminal integration"
+    }
+    elseif ($results.VSCodePowerShellIntegration -eq $false) {
+        Write-Host "  • PowerShell 7 terminal integration: Skipped" -ForegroundColor Gray
+    }
 }
 else {
     Write-Error "Visual Studio Code - Installation failed or needs restart"