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/wallet/json-keystore.d.ts

@@ -0,0 +1,89 @@
+/**
+ *  The JSON Wallet formats allow a simple way to store the private
+ *  keys needed in Ethereum along with related information and allows
+ *  for extensible forms of encryption.
+ *
+ *  These utilities facilitate decrypting and encrypting the most common
+ *  JSON Wallet formats.
+ *
+ *  @_subsection: api/wallet:JSON Wallets  [json-wallets]
+ */
+import type { ProgressCallback } from "../crypto/index.js";
+import type { BytesLike } from "../utils/index.js";
+/**
+ *  The contents of a JSON Keystore Wallet.
+ */
+export type KeystoreAccount = {
+    address: string;
+    privateKey: string;
+    mnemonic?: {
+        path?: string;
+        locale?: string;
+        entropy: string;
+    };
+};
+/**
+ *  The parameters to use when encrypting a JSON Keystore Wallet.
+ */
+export type EncryptOptions = {
+    progressCallback?: ProgressCallback;
+    iv?: BytesLike;
+    entropy?: BytesLike;
+    client?: string;
+    salt?: BytesLike;
+    uuid?: string;
+    scrypt?: {
+        N?: number;
+        r?: number;
+        p?: number;
+    };
+};
+/**
+ *  Returns true if %%json%% is a valid JSON Keystore Wallet.
+ */
+export declare function isKeystoreJson(json: string): boolean;
+/**
+ *  Returns the account details for the JSON Keystore Wallet %%json%%
+ *  using %%password%%.
+ *
+ *  It is preferred to use the [async version](decryptKeystoreJson)
+ *  instead, which allows a [[ProgressCallback]] to keep the user informed
+ *  as to the decryption status.
+ *
+ *  This method will block the event loop (freezing all UI) until decryption
+ *  is complete, which can take quite some time, depending on the wallet
+ *  paramters and platform.
+ */
+export declare function decryptKeystoreJsonSync(json: string, _password: string | Uint8Array): KeystoreAccount;
+/**
+ *  Resolves to the decrypted JSON Keystore Wallet %%json%% using the
+ *  %%password%%.
+ *
+ *  If provided, %%progress%% will be called periodically during the
+ *  decrpytion to provide feedback, and if the function returns
+ *  ``false`` will halt decryption.
+ *
+ *  The %%progressCallback%% will **always** receive ``0`` before
+ *  decryption begins and ``1`` when complete.
+ */
+export declare function decryptKeystoreJson(json: string, _password: string | Uint8Array, progress?: ProgressCallback): Promise<KeystoreAccount>;
+/**
+ *  Return the JSON Keystore Wallet for %%account%% encrypted with
+ *  %%password%%.
+ *
+ *  The %%options%% can be used to tune the password-based key
+ *  derivation function parameters, explicitly set the random values
+ *  used. Any provided [[ProgressCallback]] is ignord.
+ */
+export declare function encryptKeystoreJsonSync(account: KeystoreAccount, password: string | Uint8Array, options?: EncryptOptions): string;
+/**
+ *  Resolved to the JSON Keystore Wallet for %%account%% encrypted
+ *  with %%password%%.
+ *
+ *  The %%options%% can be used to tune the password-based key
+ *  derivation function parameters, explicitly set the random values
+ *  used and provide a [[ProgressCallback]] to receive periodic updates
+ *  on the completion status..
+ */
+export declare function encryptKeystoreJson(account: KeystoreAccount, password: string | Uint8Array, options?: EncryptOptions): Promise<string>;
+//# sourceMappingURL=json-keystore.d.ts.map