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/lib.esm/utils/events.js

@@ -0,0 +1,42 @@
+/**
+ *  Events allow for applications to use the observer pattern, which
+ *  allows subscribing and publishing events, outside the normal
+ *  execution paths.
+ *
+ *  @_section api/utils/events:Events  [about-events]
+ */
+import { defineProperties } from "./properties.js";
+/**
+ *  When an [[EventEmitterable]] triggers a [[Listener]], the
+ *  callback always ahas one additional argument passed, which is
+ *  an **EventPayload**.
+ */
+export class EventPayload {
+    /**
+     *  The event filter.
+     */
+    filter;
+    /**
+     *  The **EventEmitterable**.
+     */
+    emitter;
+    #listener;
+    /**
+     *  Create a new **EventPayload** for %%emitter%% with
+     *  the %%listener%% and for %%filter%%.
+     */
+    constructor(emitter, listener, filter) {
+        this.#listener = listener;
+        defineProperties(this, { emitter, filter });
+    }
+    /**
+     *  Unregister the triggered listener for future events.
+     */
+    async removeListener() {
+        if (this.#listener == null) {
+            return;
+        }
+        await this.emitter.off(this.filter, this.#listener);
+    }
+}
+//# sourceMappingURL=events.js.map