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/hardhat/templates/hardhat-3/03-minimal/README.md

@@ -0,0 +1,7 @@
+# Sample Hardhat 3 Beta Project (minimal)
+
+This project has a minimal setup of Hardhat 3 Beta, without any plugins.
+
+## What's included?
+
+The project includes native support for TypeScript, Hardhat scripts, tasks, and support for Solidity compilation and tests.

dev/env/node_modules/hardhat/templates/hardhat-3/03-minimal/gitignore

@@ -0,0 +1,20 @@
+# Node modules
+/node_modules
+
+# Compilation output
+/dist
+
+# pnpm deploy output
+/bundle
+
+# Hardhat Build Artifacts
+/artifacts
+
+# Hardhat compilation (v2) support directory
+/cache
+
+# Typechain output
+/types
+
+# Hardhat coverage reports
+/coverage

dev/env/node_modules/hardhat/templates/hardhat-3/03-minimal/hardhat.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from "hardhat/config";
+
+export default defineConfig({
+  solidity: {
+    version: "0.8.28",
+  },
+});

dev/env/node_modules/hardhat/templates/hardhat-3/03-minimal/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "template-minimal",
+  "private": true,
+  "version": "0.0.1",
+  "description": "A minimal Hardhat project",
+  "type": "module",
+  "devDependencies": {
+    "hardhat": "workspace:^3.1.10",
+    "@types/node": "^22.8.5",
+    "typescript": "~5.8.0"
+  }
+}

dev/env/node_modules/hardhat/templates/hardhat-3/03-minimal/tsconfig.json

@@ -0,0 +1,13 @@
+/* Based on https://github.com/tsconfig/bases/blob/501da2bcd640cf95c95805783e1012b992338f28/bases/node22.json */
+{
+  "compilerOptions": {
+    "lib": ["es2023"],
+    "module": "node16",
+    "target": "es2022",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "moduleResolution": "node16",
+    "outDir": "dist"
+  }
+}