feat: add GetGUIDApp.ps1 utility to help find software GUIDs

utils/GetGUIDApp.ps1

@@ -0,0 +1,56 @@
+<#
+.SYNOPSIS
+    Lists installed software and their GUIDs/Registry Keys.
+
+.DESCRIPTION
+    This script scans the Windows Registry (HKLM and WOW6432Node) for installed applications
+    and outputs their Display Name and Registry Key Name (which is often the MSI GUID).
+    
+    Useful for finding the GUID of software to target for uninstallation.
+
+.PARAMETER Filter
+    Optional string to filter the results by Display Name.
+
+.EXAMPLE
+    .\GetGUIDApp.ps1
+    Lists all installed software in a grid view.
+
+.EXAMPLE
+    .\GetGUIDApp.ps1 -Filter "Printer"
+    Lists only software with "Printer" in the name.
+#>
+
+param (
+    [string]$Filter = ""
+)
+
+$paths = @(
+    "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*",
+    "HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*"
+)
+
+Write-Host "Scanning Registry for Installed Software..." -ForegroundColor Cyan
+
+$results = @()
+
+foreach ($path in $paths) {
+    $items = Get-ItemProperty $path -ErrorAction SilentlyContinue
+    foreach ($item in $items) {
+        if (-not [string]::IsNullOrWhiteSpace($item.DisplayName)) {
+            $results += [PSCustomObject]@{
+                DisplayName     = $item.DisplayName
+                RegistryKeyName = $item.PSChildName # This is the GUID for MSI apps
+                UninstallString = $item.UninstallString
+            }
+        }
+    }
+}
+
+if (-not [string]::IsNullOrWhiteSpace($Filter)) {
+    Write-Host "Filtering for: '$Filter'" -ForegroundColor Yellow
+    $results = $results | Where-Object { $_.DisplayName -match "(?i)$Filter" }
+}
+
+$results | Sort-Object DisplayName | Out-GridView -Title "Installed Software (Select to see details)"
+
+Write-Host "Done. Check the Grid View window." -ForegroundColor Green