Implement TR-069 Upload method

ui/task-queue.ts

@@ -89,6 +89,14 @@ export function stageDownload(task: StageTask): void {
   staging.add(task);
 }
 
+export function stageUpload(task: StageTask): void {
+  if (queue.size + task.devices.length > MAX_QUEUE) {
+    notifications.push("error", "Too many tasks in queue");
+    return;
+  }
+  staging.add(task);
+}
+
 export function commit(
   tasks: QueueTask[],
   callback: (