优化内存分享，修复一些问题，新增答题投票功能

cmonitor/client/reports/command/CommandReport.cs

@@ -0,0 +1,17 @@
+namespace cmonitor.client.reports.command
+{
+    public sealed class CommandReport : IReport
+    {
+        public string Name => "Command";
+
+        public CommandReport()
+        {
+        }
+
+        public object GetReports(ReportType reportType)
+        {
+            return null;
+        }
+    }
+
+}