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/abi/index.ts

@@ -0,0 +1,41 @@
+/**
+ *  The Application Binary Interface (ABI) describes how method input
+ *  parameters should be encoded, their results decoded, and how to
+ *  decode events and errors.
+ *
+ *  See [About ABIs](docs-abi) for more details how they are used.
+ *
+ *  @_section api/abi:Application Binary Interface  [about-abi]
+ *  @_navTitle: ABI
+ */
+
+
+//////
+export { AbiCoder } from "./abi-coder.js";
+
+export { decodeBytes32String, encodeBytes32String } from "./bytes32.js";
+
+export {
+    ConstructorFragment, ErrorFragment, EventFragment, FallbackFragment,
+    Fragment, FunctionFragment, NamedFragment, ParamType, StructFragment,
+} from "./fragments.js";
+
+export {
+    checkResultErrors,
+    Indexed,
+    Interface,
+    ErrorDescription, LogDescription, TransactionDescription,
+    Result
+} from "./interface.js";
+
+export { Typed } from "./typed.js";
+
+export type {
+    JsonFragment, JsonFragmentType,
+    FormatType, FragmentType, ParamTypeWalkAsyncFunc, ParamTypeWalkFunc
+} from "./fragments.js";
+
+export type {
+    InterfaceAbi,
+} from "./interface.js";
+