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/rlp.d.ts

@@ -0,0 +1,22 @@
+import * as P from 'micro-packed';
+export type RLPInput = string | number | Uint8Array | bigint | RLPInput[] | null;
+export type InternalRLP = {
+    TAG: 'byte';
+    data: number;
+} | {
+    TAG: 'complex';
+    data: {
+        TAG: 'string';
+        data: Uint8Array;
+    } | {
+        TAG: 'list';
+        data: InternalRLP[];
+    };
+};
+/**
+ * RLP parser.
+ * Real type of rlp is `Item = Uint8Array | Item[]`.
+ * Strings/number encoded to Uint8Array, but not decoded back: type information is lost.
+ */
+export declare const RLP: P.CoderType<RLPInput>;
+//# sourceMappingURL=rlp.d.ts.map