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/utils/properties.ts

@@ -0,0 +1,60 @@
+/**
+ *  Property helper functions.
+ *
+ *  @_subsection api/utils:Properties  [about-properties]
+ */
+
+function checkType(value: any, type: string, name: string): void {
+    const types = type.split("|").map(t => t.trim());
+    for (let i = 0; i < types.length; i++) {
+        switch (type) {
+            case "any":
+                return;
+            case "bigint":
+            case "boolean":
+            case "number":
+            case "string":
+                if (typeof(value) === type) { return; }
+        }
+    }
+
+    const error: any = new Error(`invalid value for type ${ type }`);
+    error.code = "INVALID_ARGUMENT";
+    error.argument = `value.${ name }`;
+    error.value = value;
+
+    throw error;
+}
+
+/**
+ *  Resolves to a new object that is a copy of %%value%%, but with all
+ *  values resolved.
+ */
+export async function resolveProperties<T>(value: { [ P in keyof T ]: T[P] | Promise<T[P]>}): Promise<T> {
+    const keys = Object.keys(value);
+    const results = await Promise.all(keys.map((k) => Promise.resolve(value[<keyof T>k])));
+    return results.reduce((accum: any, v, index) => {
+        accum[keys[index]] = v;
+        return accum;
+    }, <{ [ P in keyof T]: T[P] }>{ });
+}
+
+/**
+ *  Assigns the %%values%% to %%target%% as read-only values.
+ *
+ *  It %%types%% is specified, the values are checked.
+ */
+export function defineProperties<T>(
+ target: T,
+ values: { [ K in keyof T ]?: T[K] },
+ types?: { [ K in keyof T ]?: string }): void {
+
+    for (let key in values) {
+        let value = values[key];
+
+        const type = (types ? types[key]: null);
+        if (type) { checkType(value, type, key); }
+
+        Object.defineProperty(target, key, { enumerable: true, value, writable: false });
+    }
+}