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/ethers/lib.commonjs/utils/rlp-encode.js

@@ -0,0 +1,53 @@
+"use strict";
+//See: https://github.com/ethereum/wiki/wiki/RLP
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.encodeRlp = void 0;
+const data_js_1 = require("./data.js");
+function arrayifyInteger(value) {
+    const result = [];
+    while (value) {
+        result.unshift(value & 0xff);
+        value >>= 8;
+    }
+    return result;
+}
+function _encode(object) {
+    if (Array.isArray(object)) {
+        let payload = [];
+        object.forEach(function (child) {
+            payload = payload.concat(_encode(child));
+        });
+        if (payload.length <= 55) {
+            payload.unshift(0xc0 + payload.length);
+            return payload;
+        }
+        const length = arrayifyInteger(payload.length);
+        length.unshift(0xf7 + length.length);
+        return length.concat(payload);
+    }
+    const data = Array.prototype.slice.call((0, data_js_1.getBytes)(object, "object"));
+    if (data.length === 1 && data[0] <= 0x7f) {
+        return data;
+    }
+    else if (data.length <= 55) {
+        data.unshift(0x80 + data.length);
+        return data;
+    }
+    const length = arrayifyInteger(data.length);
+    length.unshift(0xb7 + length.length);
+    return length.concat(data);
+}
+const nibbles = "0123456789abcdef";
+/**
+ *  Encodes %%object%% as an RLP-encoded [[DataHexString]].
+ */
+function encodeRlp(object) {
+    let result = "0x";
+    for (const v of _encode(object)) {
+        result += nibbles[v >> 4];
+        result += nibbles[v & 0xf];
+    }
+    return result;
+}
+exports.encodeRlp = encodeRlp;
+//# sourceMappingURL=rlp-encode.js.map