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/transaction/accesslist.ts

@@ -0,0 +1,43 @@
+import { getAddress } from "../address/index.js";
+import { assertArgument, isHexString } from "../utils/index.js";
+
+import type { AccessList, AccessListish } from "./index.js";
+
+
+function accessSetify(addr: string, storageKeys: Array<string>): { address: string,storageKeys: Array<string> } {
+    return {
+        address: getAddress(addr),
+        storageKeys: storageKeys.map((storageKey, index) => {
+            assertArgument(isHexString(storageKey, 32), "invalid slot", `storageKeys[${ index }]`, storageKey);
+            return storageKey.toLowerCase();
+        })
+    };
+}
+
+/**
+ *  Returns a [[AccessList]] from any ethers-supported access-list structure.
+ */
+export function accessListify(value: AccessListish): AccessList {
+    if (Array.isArray(value)) {
+        return (<Array<[ string, Array<string>] | { address: string, storageKeys: Array<string>}>>value).map((set, index) => {
+            if (Array.isArray(set)) {
+                assertArgument(set.length === 2, "invalid slot set", `value[${ index }]`, set);
+                return accessSetify(set[0], set[1])
+            }
+            assertArgument(set != null && typeof(set) === "object", "invalid address-slot set", "value", value);
+            return accessSetify(set.address, set.storageKeys);
+        });
+    }
+
+    assertArgument(value != null && typeof(value) === "object", "invalid access list", "value", value);
+
+    const result: Array<{ address: string, storageKeys: Array<string> }> = Object.keys(value).map((addr) => {
+        const storageKeys: Record<string, true> = value[addr].reduce((accum, storageKey) => {
+            accum[storageKey] = true;
+            return accum;
+        }, <Record<string, true>>{ });
+        return accessSetify(addr, Object.keys(storageKeys).sort())
+    });
+    result.sort((a, b) => (a.address.localeCompare(b.address)));
+    return result;
+}

dev/env/node_modules/ethers/src.ts/transaction/address.ts

@@ -0,0 +1,28 @@
+import { getAddress } from "../address/index.js";
+import { keccak256, SigningKey } from "../crypto/index.js";
+
+import type { SignatureLike } from "../crypto/index.js";
+import type { BytesLike } from "../utils/index.js";
+
+/**
+ *  Returns the address for the %%key%%.
+ *
+ *  The key may be any standard form of public key or a private key.
+ */
+export function computeAddress(key: string | SigningKey): string {
+    let pubkey: string;
+    if (typeof(key) === "string") {
+        pubkey = SigningKey.computePublicKey(key, false);
+    } else {
+        pubkey = key.publicKey;
+    }
+    return getAddress(keccak256("0x" + pubkey.substring(4)).substring(26));
+}
+
+/**
+ *  Returns the recovered address for the private key that was
+ *  used to sign %%digest%% that resulted in %%signature%%.
+ */
+export function recoverAddress(digest: BytesLike, signature: SignatureLike): string {
+    return computeAddress(SigningKey.recoverPublicKey(digest, signature));
+}

dev/env/node_modules/ethers/src.ts/transaction/authorization.ts

@@ -0,0 +1,14 @@
+import { getAddress } from "../address/index.js";
+import { Signature } from "../crypto/index.js";
+import { getBigInt } from "../utils/index.js";
+
+import type { Authorization, AuthorizationLike } from "./index.js";
+
+export function authorizationify(auth: AuthorizationLike): Authorization {
+    return {
+        address: getAddress(auth.address),
+        nonce: getBigInt((auth.nonce != null) ? auth.nonce: 0),
+        chainId: getBigInt((auth.chainId != null)? auth.chainId: 0),
+        signature: Signature.from(auth.signature)
+    };
+}

dev/env/node_modules/ethers/src.ts/transaction/index.ts

@@ -0,0 +1,51 @@
+/**
+ *  Each state-changing operation on Ethereum requires a transaction.
+ *
+ *  @_section api/transaction:Transactions  [about-transactions]
+ */
+
+null;
+
+import type { BigNumberish } from "../utils/maths.js";
+import type { Signature, SignatureLike } from "../crypto/index.js";
+
+/**
+ *  A single [[AccessList]] entry of storage keys (slots) for an address.
+ */
+export type AccessListEntry = { address: string, storageKeys: Array<string> };
+
+/**
+ *  An ordered collection of [[AccessList]] entries.
+ */
+export type AccessList = Array<AccessListEntry>;
+
+/**
+ *  Any ethers-supported access list structure.
+ */
+export type AccessListish = AccessList |
+                            Array<[ string, Array<string> ]> |
+                            Record<string, Array<string>>;
+
+// Keep here?
+export interface Authorization {
+    address: string;
+    nonce: bigint;
+    chainId: bigint;
+    signature: Signature;
+}
+
+export type AuthorizationLike = {
+    address: string;
+    nonce: BigNumberish;
+    chainId: BigNumberish;
+    signature: SignatureLike
+};
+
+export { accessListify } from "./accesslist.js";
+export { authorizationify } from "./authorization.js";
+export { computeAddress, recoverAddress } from "./address.js";
+export { Transaction } from "./transaction.js";
+
+export type {
+    Blob, BlobLike, KzgLibrary, KzgLibraryLike, TransactionLike
+} from "./transaction.js";