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/cli_env/lib/python3.13/site-packages/keyring/http.py

@@ -0,0 +1,39 @@
+"""
+urllib2.HTTPPasswordMgr object using the keyring, for use with the
+urllib2.HTTPBasicAuthHandler.
+
+usage:
+    import urllib2
+    handlers = [urllib2.HTTPBasicAuthHandler(PasswordMgr())]
+    urllib2.install_opener(handlers)
+    urllib2.urlopen(...)
+
+This will prompt for a password if one is required and isn't already
+in the keyring. Then, it adds it to the keyring for subsequent use.
+"""
+
+import getpass
+
+from . import delete_password, get_password, set_password
+
+
+class PasswordMgr:
+    def get_username(self, realm, authuri):
+        return getpass.getuser()
+
+    def add_password(self, realm, authuri, password):
+        user = self.get_username(realm, authuri)
+        set_password(realm, user, password)
+
+    def find_user_password(self, realm, authuri):
+        user = self.get_username(realm, authuri)
+        password = get_password(realm, user)
+        if password is None:
+            prompt = f'password for {user}@{realm} for {authuri}: '
+            password = getpass.getpass(prompt)
+            set_password(realm, user, password)
+        return user, password
+
+    def clear_password(self, realm, authuri):
+        user = self.get_username(realm, authuri)
+        delete_password(realm, user)