Improve app page with sorting, recommendations and more (#520)

Scripts/AppRemoval/GetInstalledAppsViaWinget.ps1

@@ -0,0 +1,31 @@
+
+# Run winget list and return installed apps.
+# Use -NonBlocking to keep the UI responsive (GUI mode) via Invoke-NonBlocking.
+function GetInstalledAppsViaWinget {
+    param (
+        [int]$TimeOut = 10,
+        [switch]$NonBlocking
+    )
+
+    if (-not $script:WingetInstalled) { return $null }
+
+    $fetchBlock = {
+        param($timeOut)
+        $job = Start-Job { return winget list --accept-source-agreements --disable-interactivity }
+        $done = $job | Wait-Job -Timeout $timeOut
+        if ($done) {
+            $result = Receive-Job -Job $job
+            Remove-Job -Job $job -ErrorAction SilentlyContinue
+            return $result
+        }
+        Remove-Job -Job $job -Force -ErrorAction SilentlyContinue
+        return $null
+    }
+
+    if ($NonBlocking) {
+        return Invoke-NonBlocking -ScriptBlock $fetchBlock -ArgumentList $TimeOut
+    }
+    else {
+        return & $fetchBlock $TimeOut
+    }
+}