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/completer.js

@@ -0,0 +1,52 @@
+'use strict';
+
+const unique = arr => arr.filter((v, i) => arr.lastIndexOf(v) === i);
+const compact = arr => unique(arr).filter(Boolean);
+
+module.exports = (action, data = {}, value = '') => {
+  let { past = [], present = '' } = data;
+  let rest, prev;
+
+  switch (action) {
+    case 'prev':
+    case 'undo':
+      rest = past.slice(0, past.length - 1);
+      prev = past[past.length - 1] || '';
+      return {
+        past: compact([value, ...rest]),
+        present: prev
+      };
+
+    case 'next':
+    case 'redo':
+      rest = past.slice(1);
+      prev = past[0] || '';
+      return {
+        past: compact([...rest, value]),
+        present: prev
+      };
+
+    case 'save':
+      return {
+        past: compact([...past, value]),
+        present: ''
+      };
+
+    case 'remove':
+      prev = compact(past.filter(v => v !== value));
+      present = '';
+
+      if (prev.length) {
+        present = prev.pop();
+      }
+
+      return {
+        past: prev,
+        present
+      };
+
+    default: {
+      throw new Error(`Invalid action: "${action}"`);
+    }
+  }
+};