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/src.ts/wallet/utils.ts

@@ -0,0 +1,147 @@
+/**
+ *  @_ignore
+ */
+
+import {
+    getBytesCopy, assertArgument, toUtf8Bytes
+} from "../utils/index.js";
+
+export function looseArrayify(hexString: string): Uint8Array {
+    if (typeof(hexString) === "string" && !hexString.startsWith("0x")) {
+        hexString = "0x" + hexString;
+    }
+    return getBytesCopy(hexString);
+}
+
+export function zpad(value: String | number, length: number): String {
+    value = String(value);
+    while (value.length < length) { value = '0' + value; }
+    return value;
+}
+
+export function getPassword(password: string | Uint8Array): Uint8Array {
+    if (typeof(password) === 'string') {
+        return toUtf8Bytes(password, "NFKC");
+    }
+    return getBytesCopy(password);
+}
+
+export function spelunk<T>(object: any, _path: string): T {
+
+    const match = _path.match(/^([a-z0-9$_.-]*)(:([a-z]+))?(!)?$/i);
+    assertArgument(match != null, "invalid path", "path", _path);
+
+    const path = match[1];
+    const type = match[3];
+    const reqd = (match[4] === "!");
+
+    let cur = object;
+    for (const comp of path.toLowerCase().split('.')) {
+
+        // Search for a child object with a case-insensitive matching key
+        if (Array.isArray(cur)) {
+            if (!comp.match(/^[0-9]+$/)) { break; }
+            cur = cur[parseInt(comp)];
+
+        } else if (typeof(cur) === "object") {
+            let found: any = null;
+            for (const key in cur) {
+                 if (key.toLowerCase() === comp) {
+                     found = cur[key];
+                     break;
+                 }
+            }
+            cur = found;
+
+        } else {
+            cur = null;
+        }
+
+        if (cur == null) { break; }
+    }
+
+    assertArgument(!reqd || cur != null, "missing required value", "path", path);
+
+    if (type && cur != null) {
+        if (type === "int") {
+            if (typeof(cur) === "string" && cur.match(/^-?[0-9]+$/)) {
+                return <T><unknown>parseInt(cur);
+            } else if (Number.isSafeInteger(cur)) {
+                return cur;
+            }
+        }
+
+        if (type === "number") {
+            if (typeof(cur) === "string" && cur.match(/^-?[0-9.]*$/)) {
+                return <T><unknown>parseFloat(cur);
+            }
+        }
+
+        if (type === "data") {
+            if (typeof(cur) === "string") { return <T><unknown>looseArrayify(cur); }
+        }
+
+        if (type === "array" && Array.isArray(cur)) { return <T><unknown>cur; }
+        if (type === typeof(cur)) { return cur; }
+
+        assertArgument(false, `wrong type found for ${ type } `, "path", path);
+    }
+
+    return cur;
+}
+/*
+export function follow(object: any, path: string): null | string {
+    let currentChild = object;
+
+    for (const comp of path.toLowerCase().split('/')) {
+
+        // Search for a child object with a case-insensitive matching key
+        let matchingChild = null;
+        for (const key in currentChild) {
+             if (key.toLowerCase() === comp) {
+                 matchingChild = currentChild[key];
+                 break;
+             }
+        }
+
+        if (matchingChild === null) { return null; }
+
+        currentChild = matchingChild;
+    }
+
+    return currentChild;
+}
+
+// "path/to/something:type!"
+export function followRequired(data: any, path: string): string {
+    const value = follow(data, path);
+    if (value != null) { return value; }
+    return logger.throwArgumentError("invalid value", `data:${ path }`,
+    JSON.stringify(data));
+}
+*/
+// See: https://www.ietf.org/rfc/rfc4122.txt (Section 4.4)
+/*
+export function uuidV4(randomBytes: BytesLike): string {
+    const bytes = getBytes(randomBytes, "randomBytes");
+
+    // Section: 4.1.3:
+    // - time_hi_and_version[12:16] = 0b0100
+    bytes[6] = (bytes[6] & 0x0f) | 0x40;
+
+    // Section 4.4
+    // - clock_seq_hi_and_reserved[6] = 0b0
+    // - clock_seq_hi_and_reserved[7] = 0b1
+    bytes[8] = (bytes[8] & 0x3f) | 0x80;
+
+    const value = hexlify(bytes);
+
+    return [
+       value.substring(2, 10),
+       value.substring(10, 14),
+       value.substring(14, 18),
+       value.substring(18, 22),
+       value.substring(22, 34),
+    ].join("-");
+}
+*/