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/scrypt.d.ts

@@ -0,0 +1,29 @@
+import { Input } from './utils.js';
+export type ScryptOpts = {
+    N: number;
+    r: number;
+    p: number;
+    dkLen?: number;
+    asyncTick?: number;
+    maxmem?: number;
+    onProgress?: (progress: number) => void;
+};
+/**
+ * Scrypt KDF from RFC 7914.
+ * @param password - pass
+ * @param salt - salt
+ * @param opts - parameters
+ * - `N` is cpu/mem work factor (power of 2 e.g. 2**18)
+ * - `r` is block size (8 is common), fine-tunes sequential memory read size and performance
+ * - `p` is parallelization factor (1 is common)
+ * - `dkLen` is output key length in bytes e.g. 32.
+ * - `asyncTick` - (default: 10) max time in ms for which async function can block execution
+ * - `maxmem` - (default: `1024 ** 3 + 1024` aka 1GB+1KB). A limit that the app could use for scrypt
+ * - `onProgress` - callback function that would be executed for progress report
+ * @returns Derived key
+ */
+export declare function scrypt(password: Input, salt: Input, opts: ScryptOpts): Uint8Array;
+/**
+ * Scrypt KDF from RFC 7914.
+ */
+export declare function scryptAsync(password: Input, salt: Input, opts: ScryptOpts): Promise<Uint8Array>;