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/cache/.vscode/settings.json

@@ -0,0 +1,50 @@
+{
+  "files.exclude": {
+    "**/.git": true,
+    "**/.svn": true,
+    "**/.hg": true,
+    "**/CVS": true,
+    "**/.DS_Store": true,
+    "**/Thumbs.db": true,
+    "**/node_modules": true,
+    "**/.pytest_cache": true,
+    "**/.ruff_cache": true,
+    "**/.venv": true,
+    "**/logs": true,
+    "**/cli_env": true
+  },
+  "files.watcherExclude": {
+    "**/node_modules/**": true,
+    "**/.pytest_cache/**": true,
+    "**/.ruff_cache/**": true,
+    "**/.venv/**": true,
+    "**/logs/**": true,
+    "**/cli_env/**": true
+  },
+  "python.linting.enabled": true,
+  "python.linting.pylintEnabled": false,
+  "python.linting.flake8Enabled": true,
+  "python.formatting.provider": "black",
+  "editor.formatOnSave": true,
+  "editor.codeActionsOnSave": {
+    "source.organizeImports": true
+  },
+  "files.associations": {
+    "*.py": "python",
+    "*.sh": "shellscript",
+    "*.yaml": "yaml",
+    "*.yml": "yaml",
+    "*.md": "markdown"
+  },
+  "python.defaultInterpreterPath": "./cli/venv/bin/python",
+  "terminal.integrated.cwd": ".",
+  "explorer.fileNesting.enabled": true,
+  "explorer.fileNesting.patterns": {
+    "*.py": "*.py",
+    "*.sh": "*.sh",
+    "*.md": "*.md",
+    "package.json": "package-lock.json",
+    "pyproject.toml": "poetry.lock",
+    ".env.example": ".env*"
+  }
+}