feat: implement automatic ring positioning

- Remove manual --position parameter from CLI
- Add automatic optimal position calculation based on gap analysis
- Implement dynamic ring topology management
- Add position tracking and synchronization across nodes
- Add topology command for visual ring structure inspection
- Clean up unused variables and dead code
- Simplify node setup with automatic positioning

config/ice-servers-public-turn.json

@@ -1,21 +0,0 @@
-{
-  "iceServers": [
-    {
-      "urls": [
-        "stun:stun.l.google.com:19302",
-        "stun:stun1.l.google.com:19302",
-        "stun:stun2.l.google.com:19302"
-      ]
-    },
-    {
-      "urls": "turn:openrelay.metered.ca:80",
-      "username": "openrelayproject",
-      "credential": "openrelayproject"
-    },
-    {
-      "urls": "turn:openrelay.metered.ca:443",
-      "username": "openrelayproject", 
-      "credential": "openrelayproject"
-    }
-  ]
-}