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/tsx/README.md

@@ -0,0 +1,32 @@
+<h1 align="center">
+<br>
+<picture>
+	<source media="(prefers-color-scheme: dark)" srcset=".github/logo-dark.svg">
+	<img width="160" alt="tsx" src=".github/logo-light.svg">
+</picture>
+<br><br>
+<a href="https://npm.im/tsx"><img src="https://badgen.net/npm/v/tsx"></a> <a href="https://npm.im/tsx"><img src="https://badgen.net/npm/dm/tsx"></a>
+</h1>
+
+<p align="center">
+TypeScript Execute (tsx): The easiest way to run TypeScript in Node.js
+<br><br>
+<a href="https://tsx.is">Documentation</a>&nbsp;&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;&nbsp;<a href="https://tsx.is/getting-started">Getting started →</a>
+</p>
+
+<br>
+
+<p align="center">
+	<a href="https://github.com/sponsors/privatenumber/sponsorships?tier_id=398771"><img width="412" src="https://raw.githubusercontent.com/privatenumber/sponsors/master/banners/assets/donate.webp"></a>
+	<a href="https://github.com/sponsors/privatenumber/sponsorships?tier_id=416984"><img width="412" src="https://raw.githubusercontent.com/privatenumber/sponsors/master/banners/assets/sponsor.webp"></a>
+</p>
+<p align="center"><sup><i>Already a sponsor?</i> Join the discussion in the <a href="https://github.com/pvtnbr/tsx">Development repo</a>!</sup></p>
+
+## Sponsors
+
+<p align="center">
+	<a href="https://github.com/sponsors/privatenumber">
+		<img src="https://cdn.jsdelivr.net/gh/privatenumber/sponsors/sponsorkit/sponsors.svg">
+	</a>
+</p>
+