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.commonjs/providers/default-provider.d.ts

@@ -0,0 +1,49 @@
+import type { AbstractProvider } from "./abstract-provider.js";
+import type { Networkish } from "./network.js";
+import { WebSocketLike } from "./provider-websocket.js";
+/**
+ *  Returns a default provider for %%network%%.
+ *
+ *  If %%network%% is a [[WebSocketLike]] or string that begins with
+ *  ``"ws:"`` or ``"wss:"``, a [[WebSocketProvider]] is returned backed
+ *  by that WebSocket or URL.
+ *
+ *  If %%network%% is a string that begins with ``"HTTP:"`` or ``"HTTPS:"``,
+ *  a [[JsonRpcProvider]] is returned connected to that URL.
+ *
+ *  Otherwise, a default provider is created backed by well-known public
+ *  Web3 backends (such as [[link-infura]]) using community-provided API
+ *  keys.
+ *
+ *  The %%options%% allows specifying custom API keys per backend (setting
+ *  an API key to ``"-"`` will omit that provider) and ``options.exclusive``
+ *  can be set to either a backend name or and array of backend names, which
+ *  will whitelist **only** those backends.
+ *
+ *  Current backend strings supported are:
+ *  - ``"alchemy"``
+ *  - ``"ankr"``
+ *  - ``"cloudflare"``
+ *  - ``"chainstack"``
+ *  - ``"etherscan"``
+ *  - ``"infura"``
+ *  - ``"publicPolygon"``
+ *  - ``"quicknode"``
+ *
+ *  @example:
+ *    // Connect to a local Geth node
+ *    provider = getDefaultProvider("http://localhost:8545/");
+ *
+ *    // Connect to Ethereum mainnet with any current and future
+ *    // third-party services available
+ *    provider = getDefaultProvider("mainnet");
+ *
+ *    // Connect to Polygon, but only allow Etherscan and
+ *    // INFURA and use "MY_API_KEY" in calls to Etherscan.
+ *    provider = getDefaultProvider("matic", {
+ *      etherscan: "MY_API_KEY",
+ *      exclusive: [ "etherscan", "infura" ]
+ *    });
+ */
+export declare function getDefaultProvider(network?: string | Networkish | WebSocketLike, options?: any): AbstractProvider;
+//# sourceMappingURL=default-provider.d.ts.map