Add server control (start/stop/restart, live logs, broadcast, kick) to webadmin

Docker SDK drives login/char/worldserver containers via docker.sock (mounted
read-only into webadmin); live logs stream over SSE with nginx buffering
disabled so lines arrive in real time. Broadcast/kick go through a new
admin_queue DB table that the world server polls every ~2s in its existing
WorldProcess tick loop, avoiding a second IPC channel to the game server.

Src/World Server/MainProcess.cpp

@@ -403,8 +403,16 @@ PVOID VisibilityProcess(PVOID TS)
 // World Process
 PVOID WorldProcess( PVOID TS )
 {
+    int adminQueueTicks = 0;
     while( GServer->ServerOnline )
     {
+        // Poll roughly every 2 seconds regardless of WorldDelay, instead of
+        // hitting the DB on every tick.
+        if( ++adminQueueTicks * GServer->Config.WorldDelay >= 2000 )
+        {
+            adminQueueTicks = 0;
+            GServer->PollAdminQueue( );
+        }
         pthread_mutex_lock( &GServer->MapMutex );
         for(UINT i=0;i<GServer->MapList.Map.size();i++)
         {