refactor: move brother_node development artifact to dev/test-nodes subdirectory

Development Artifact Cleanup:
✅ BROTHER_NODE REORGANIZATION: Moved development test node to appropriate location
- dev/test-nodes/brother_node/: Moved from root directory for better organization
- Contains development configuration, test logs, and test chain data
- No impact on production systems - purely development/testing artifact

✅ DEVELOPMENT ARTIFACTS IDENTIFIED:
- Chain ID: aitbc-brother-chain (test/development chain)
- Ports: 8010 (P2P) and 8011 (RPC) - different from production
- Environment: .env file with test configuration
- Logs: rpc.log and node.log from development testing session (March 15, 2026)

✅ ROOT DIRECTORY CLEANUP: Removed development clutter from production directory
- brother_node/ moved to dev/test-nodes/brother_node/
- Root directory now contains only production-ready components
- Development artifacts properly organized in dev/ subdirectory

DIRECTORY STRUCTURE IMPROVEMENT:
📁 dev/test-nodes/: Development and testing node configurations
🏗️ Root Directory: Clean production structure with only essential components
🧪 Development Isolation: Test environments separated from production

BENEFITS:
✅ Clean Production Directory: No development artifacts in root
✅ Better Organization: Development nodes grouped in dev/ subdirectory
✅ Clear Separation: Production vs development environments clearly distinguished
✅ Maintainability: Easier to identify and manage development components

RESULT: Successfully moved brother_node development artifact to dev/test-nodes/ subdirectory, cleaning up the root directory while preserving development testing environment for future use.

dev/env/node_modules/enquirer/lib/queue.js

@@ -0,0 +1,33 @@
+'use strict';
+
+module.exports = class Queue {
+  _queue = [];
+  _executing = false;
+  _jobRunner = null;
+
+  constructor(jobRunner) {
+    this._jobRunner = jobRunner;
+  }
+
+  enqueue = (...args) => {
+    this._queue.push(args);
+    this._dequeue();
+  };
+
+  destroy() {
+    this._queue.length = 0;
+    this._jobRunner = null;
+  }
+
+  _dequeue() {
+    if (this._executing || !this._queue.length) return;
+    this._executing = true;
+
+    this._jobRunner(...this._queue.shift());
+
+    setTimeout(() => {
+      this._executing = false;
+      this._dequeue();
+    });
+  }
+};