Rework ADK detection

functions/microwin/Microwin-GetKitsRoot.ps1

@@ -0,0 +1,40 @@
+function Microwin-GetKitsRoot {
+    <#
+        .SYNOPSIS
+            Gets the kits root path for the Windows Assessment and Deployment Kit (ADK)
+        .PARAMETER wow64environment
+            Determines whether to search in a WOW64 compatibility environment (HKLM\SOFTWARE\WOW6432Node)
+        .OUTPUTS
+            The path to the kits root
+    #>
+
+    param (
+        [Parameter(Mandatory = $true, Position = 0)] [bool]$wow64environment
+    )
+
+    $adk10KitsRoot = ""
+
+    # if we set the wow64 bit on and we're on a 32-bit system, then we prematurely return the value
+    if (($wow64environment -eq $true) -and (-not [Environment]::Is64BitOperatingSystem)) {
+        return $adk10KitsRoot
+    }
+
+    $regPath = ""
+    if ($wow64environment) {
+        $regPath = "HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows Kits\Installed Roots"
+    } else {
+        $regPath = "HKLM:\SOFTWARE\Microsoft\Windows Kits\Installed Roots"
+    }
+
+    if ((Test-Path "$regPath") -eq $false) {
+        return $adk10KitsRoot
+    }
+
+    try {
+        $adk10KitsRoot = Get-ItemPropertyValue -Path $regPath -Name "KitsRoot10" -ErrorAction Stop
+    } catch {
+        Write-Host "Could not find ADK."
+    }
+
+    return $adk10KitsRoot
+}