WebSocket real-time updates: faster polling + network events

- Reduce polling interval to 5 seconds for faster updates
- Add network update events (peer count changes)
- Include block type (PoS/PoW) in newBlock events
- Track connected WebSocket clients
- Emit networkUpdate when peer count changes

This enables real-time live feed on the explorer frontend.

node_modules/@socket.io/component-emitter/package.json

@@ -0,0 +1,28 @@
+{
+  "name": "@socket.io/component-emitter",
+  "description": "Event emitter",
+  "version": "3.1.2",
+  "license": "MIT",
+  "devDependencies": {
+    "mocha": "*",
+    "should": "*"
+  },
+  "component": {
+    "scripts": {
+      "emitter/index.js": "index.js"
+    }
+  },
+  "main": "./lib/cjs/index.js",
+  "module": "./lib/esm/index.js",
+  "types": "./lib/cjs/index.d.ts",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/socketio/emitter.git"
+  },
+  "scripts": {
+    "test": "make test"
+  },
+  "files": [
+    "lib/"
+  ]
+}