Add TWS (Hong Kong server) to server.json (#2070)

- A Co-op server based in Hong Kong.
- The server is also known as (ggg.sytes.net), renamed the domain name for easier identification
- Been stable and regularly maintained since 4 Feb.
- Have moderators across different timezone.
- Map pool focused on uniqueness.

servers.json

@@ -52,5 +52,8 @@
   },
   {
     "address": "mindustry.kbni.net.au:6568"
+  },
+  {
+    "address": "twsmindustry.24x7.hk"
   }
 ]