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/sha3.d.ts

@@ -0,0 +1,97 @@
+import { Hash, Input, HashXOF } from './utils.js';
+export declare function keccakP(s: Uint32Array, rounds?: number): void;
+export declare class Keccak extends Hash<Keccak> implements HashXOF<Keccak> {
+    blockLen: number;
+    suffix: number;
+    outputLen: number;
+    protected enableXOF: boolean;
+    protected rounds: number;
+    protected state: Uint8Array;
+    protected pos: number;
+    protected posOut: number;
+    protected finished: boolean;
+    protected state32: Uint32Array;
+    protected destroyed: boolean;
+    constructor(blockLen: number, suffix: number, outputLen: number, enableXOF?: boolean, rounds?: number);
+    protected keccak(): void;
+    update(data: Input): this;
+    protected finish(): void;
+    protected writeInto(out: Uint8Array): Uint8Array;
+    xofInto(out: Uint8Array): Uint8Array;
+    xof(bytes: number): Uint8Array;
+    digestInto(out: Uint8Array): Uint8Array;
+    digest(): Uint8Array;
+    destroy(): void;
+    _cloneInto(to?: Keccak): Keccak;
+}
+export declare const sha3_224: {
+    (msg: Input): Uint8Array;
+    outputLen: number;
+    blockLen: number;
+    create(): Hash<Keccak>;
+};
+/**
+ * SHA3-256 hash function
+ * @param message - that would be hashed
+ */
+export declare const sha3_256: {
+    (msg: Input): Uint8Array;
+    outputLen: number;
+    blockLen: number;
+    create(): Hash<Keccak>;
+};
+export declare const sha3_384: {
+    (msg: Input): Uint8Array;
+    outputLen: number;
+    blockLen: number;
+    create(): Hash<Keccak>;
+};
+export declare const sha3_512: {
+    (msg: Input): Uint8Array;
+    outputLen: number;
+    blockLen: number;
+    create(): Hash<Keccak>;
+};
+export declare const keccak_224: {
+    (msg: Input): Uint8Array;
+    outputLen: number;
+    blockLen: number;
+    create(): Hash<Keccak>;
+};
+/**
+ * keccak-256 hash function. Different from SHA3-256.
+ * @param message - that would be hashed
+ */
+export declare const keccak_256: {
+    (msg: Input): Uint8Array;
+    outputLen: number;
+    blockLen: number;
+    create(): Hash<Keccak>;
+};
+export declare const keccak_384: {
+    (msg: Input): Uint8Array;
+    outputLen: number;
+    blockLen: number;
+    create(): Hash<Keccak>;
+};
+export declare const keccak_512: {
+    (msg: Input): Uint8Array;
+    outputLen: number;
+    blockLen: number;
+    create(): Hash<Keccak>;
+};
+export type ShakeOpts = {
+    dkLen?: number;
+};
+export declare const shake128: {
+    (msg: Input, opts?: ShakeOpts | undefined): Uint8Array;
+    outputLen: number;
+    blockLen: number;
+    create(opts: ShakeOpts): HashXOF<HashXOF<Keccak>>;
+};
+export declare const shake256: {
+    (msg: Input, opts?: ShakeOpts | undefined): Uint8Array;
+    outputLen: number;
+    blockLen: number;
+    create(opts: ShakeOpts): HashXOF<HashXOF<Keccak>>;
+};