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/@noble/hashes/_blake2.d.ts

@@ -0,0 +1,27 @@
+import { Hash, Input } from './utils.js';
+export declare const SIGMA: Uint8Array;
+export type BlakeOpts = {
+    dkLen?: number;
+    key?: Input;
+    salt?: Input;
+    personalization?: Input;
+};
+export declare abstract class BLAKE2<T extends BLAKE2<T>> extends Hash<T> {
+    readonly blockLen: number;
+    outputLen: number;
+    protected abstract compress(msg: Uint32Array, offset: number, isLast: boolean): void;
+    protected abstract get(): number[];
+    protected abstract set(...args: number[]): void;
+    abstract destroy(): void;
+    protected buffer: Uint8Array;
+    protected buffer32: Uint32Array;
+    protected length: number;
+    protected pos: number;
+    protected finished: boolean;
+    protected destroyed: boolean;
+    constructor(blockLen: number, outputLen: number, opts: BlakeOpts | undefined, keyLen: number, saltLen: number, persLen: number);
+    update(data: Input): this;
+    digestInto(out: Uint8Array): void;
+    digest(): Uint8Array;
+    _cloneInto(to?: T): T;
+}