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/micro-eth-signer/package.json

@@ -0,0 +1,112 @@
+{
+  "name": "micro-eth-signer",
+  "version": "0.14.0",
+  "description": "Minimal library for Ethereum transactions, addresses and smart contracts",
+  "files": [
+    "*.js",
+    "*.d.ts",
+    "*.js.map",
+    "*.d.ts.map",
+    "abi",
+    "esm",
+    "net",
+    "src"
+  ],
+  "main": "index.js",
+  "module": "esm/index.js",
+  "types": "esm/index.d.ts",
+  "dependencies": {
+    "@noble/curves": "~1.8.1",
+    "@noble/hashes": "~1.7.1",
+    "micro-packed": "~0.7.2"
+  },
+  "devDependencies": {
+    "@paulmillr/jsbt": "0.3.3",
+    "@paulmillr/trusted-setups": "0.1.2",
+    "micro-bmark": "0.4.0",
+    "micro-ftch": "0.4.0",
+    "micro-should": "0.5.1",
+    "prettier": "3.5.2",
+    "snappyjs": "0.7.0",
+    "typescript": "5.8.2",
+    "yaml": "2.4.1"
+  },
+  "author": "Paul Miller (https://paulmillr.com)",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/paulmillr/micro-eth-signer.git"
+  },
+  "license": "MIT",
+  "exports": {
+    ".": {
+      "import": "./esm/index.js",
+      "require": "./index.js"
+    },
+    "./abi": {
+      "import": "./esm/abi/index.js",
+      "require": "./abi/index.js"
+    },
+    "./address": {
+      "import": "./esm/address.js",
+      "require": "./address.js"
+    },
+    "./kzg": {
+      "import": "./esm/kzg.js",
+      "require": "./kzg.js"
+    },
+    "./net": {
+      "import": "./esm/net/index.js",
+      "require": "./net/index.js"
+    },
+    "./rlp": {
+      "import": "./esm/rlp.js",
+      "require": "./rlp.js"
+    },
+    "./ssz": {
+      "import": "./esm/ssz.js",
+      "require": "./ssz.js"
+    },
+    "./tx": {
+      "import": "./esm/tx.js",
+      "require": "./tx.js"
+    },
+    "./typed-data": {
+      "import": "./esm/typed-data.js",
+      "require": "./typed-data.js"
+    },
+    "./verkle": {
+      "import": "./esm/verkle.js",
+      "require": "./verkle.js"
+    },
+    "./utils": {
+      "import": "./esm/utils.js",
+      "require": "./utils.js"
+    }
+  },
+  "sideEffects": false,
+  "keywords": [
+    "ethereum",
+    "eth",
+    "create",
+    "sign",
+    "validate",
+    "transaction",
+    "address",
+    "tx",
+    "web3",
+    "ethers",
+    "micro",
+    "nano",
+    "signer"
+  ],
+  "scripts": {
+    "build": "tsc && tsc -p tsconfig.cjs.json",
+    "build:release": "npx jsbt esbuild test/build",
+    "bench": "node benchmark/tx.js",
+    "lint": "prettier --check src",
+    "format": "prettier --write src",
+    "test": "node test/index.js",
+    "test:bun": "bun test/index.js",
+    "test:deno": "deno --allow-env --allow-read test/index.js"
+  }
+}