Remove GitLens and GitGraph extensions from VSCode setup

- Keep only essential PowerShell extension and PowerShell 7 integration
- Simplify VSCode setup to focus on core requirements
- Reduce installation time and complexity
- Users can install additional Git extensions manually if desired

install-prerequisites.ps1

@@ -413,14 +413,12 @@ if ($results.VSCode) {
     # Install PowerShell extension
     $powershellExtensionResult = Install-VSCodeExtension -ExtensionId "ms-vscode.PowerShell" -ExtensionName "PowerShell"
     
-    # Install other recommended extensions
+    
-    $gitLensResult = Install-VSCodeExtension -ExtensionId "eamodio.gitlens" -ExtensionName "GitLens"
-    $gitGraphResult = Install-VSCodeExtension -ExtensionId "mhutchie.git-graph" -ExtensionName "Git Graph"
     
     # Configure PowerShell 7 integration
     $powershellIntegrationResult = Set-VSCodePowerShellIntegration
     
-    $results.VSCodeExtensions = $powershellExtensionResult -or $gitLensResult -or $gitGraphResult
+    $results.VSCodeExtensions = $powershellExtensionResult
 }
 else {
     $results.VSCodeExtensions = $false
@@ -493,12 +491,10 @@ if ($results.VSCode) {
     
     if ($results.VSCodeExtensions) {
         Write-Success "  • PowerShell extension"
-        Write-Success "  • GitLens extension" 
-        Write-Success "  • Git Graph extension"
         Write-Success "  • PowerShell 7 terminal integration"
     }
     else {
-        Write-Warning "  • Some VSCode extensions may need manual installation"
+        Write-Warning "  • VSCode PowerShell extension may need manual installation"
     }
 }
 else {