Add option to disable MS Store app results in Windows Search (#509)

This also includes:

* Update README for DisableSearchHighlights and DisableFindMyDevice

* Extracted more logic from main script into separate scripts

* Add event handler for tab changes to regenerate overview

Scripts/Features/ImportRegistryFile.ps1

@@ -0,0 +1,69 @@
+# Import & execute regfile
+function ImportRegistryFile {
+    param (
+        $message,
+        $path
+    )
+
+    Write-Host $message
+
+    # Validate that the regfile exists in both locations
+    if (-not (Test-Path "$script:RegfilesPath\$path") -or -not (Test-Path "$script:RegfilesPath\Sysprep\$path")) {
+        Write-Host "Error: Unable to find registry file: $path" -ForegroundColor Red
+        Write-Host ""
+        return
+    }
+
+    # Reset exit code before running reg.exe for reliable success detection
+    $global:LASTEXITCODE = 0
+
+    if ($script:Params.ContainsKey("Sysprep") -or $script:Params.ContainsKey("User")) {
+        # Sysprep targets Default user, User targets the specified user
+        $hiveDatPath = if ($script:Params.ContainsKey("Sysprep")) {
+            GetUserDirectory -userName "Default" -fileName "NTUSER.DAT"
+        } else {
+            GetUserDirectory -userName $script:Params.Item("User") -fileName "NTUSER.DAT"
+        }
+
+        $regResult = Invoke-NonBlocking -ScriptBlock {
+            param($datPath, $regFilePath)
+            $global:LASTEXITCODE = 0
+            reg load "HKU\Default" $datPath | Out-Null
+            $output = reg import $regFilePath 2>&1
+            $code = $LASTEXITCODE
+            reg unload "HKU\Default" | Out-Null
+            return @{ Output = $output; ExitCode = $code }
+        } -ArgumentList @($hiveDatPath, "$script:RegfilesPath\Sysprep\$path")
+    }
+    else {
+        $regResult = Invoke-NonBlocking -ScriptBlock {
+            param($regFilePath)
+            $global:LASTEXITCODE = 0
+            $output = reg import $regFilePath 2>&1
+            return @{ Output = $output; ExitCode = $LASTEXITCODE }
+        } -ArgumentList "$script:RegfilesPath\$path"
+    }
+
+    $regOutput = $regResult.Output
+    $hasSuccess = $regResult.ExitCode -eq 0
+    
+    if ($regOutput) {
+        foreach ($line in $regOutput) {
+            $lineText = if ($line -is [System.Management.Automation.ErrorRecord]) { $line.Exception.Message } else { $line.ToString() }
+            if ($lineText -and $lineText.Length -gt 0) {
+                if ($hasSuccess) {
+                    Write-Host $lineText
+                }
+                else {
+                    Write-Host $lineText -ForegroundColor Red
+                }
+            }
+        }
+    }
+
+    if (-not $hasSuccess) {
+        Write-Host "Failed importing registry file: $path" -ForegroundColor Red
+    }
+
+    Write-Host ""
+}