feat(core): Implement external node management

Introduces a dedicated system for managing a list of external nodes, each with a unique name and IP address. This feature is designed for multi-node deployments.

core/scripts/hysteria2/node.py

@@ -0,0 +1,97 @@
+#!/usr/bin/env python3
+
+import sys
+import json
+import argparse
+from pathlib import Path
+
+core_scripts_dir = Path(__file__).resolve().parents[1]
+if str(core_scripts_dir) not in sys.path:
+    sys.path.append(str(core_scripts_dir))
+
+    from paths import NODES_JSON_PATH
+
+
+
+def read_nodes():
+    if not NODES_JSON_PATH.exists():
+        return []
+    try:
+        with NODES_JSON_PATH.open("r") as f:
+            content = f.read()
+            if not content:
+                return []
+            return json.loads(content)
+    except json.JSONDecodeError:
+        sys.exit(f"Error: Could not decode JSON from {NODES_JSON_PATH}")
+    except (IOError, OSError) as e:
+        sys.exit(f"Error reading from {NODES_JSON_PATH}: {e}")
+
+def write_nodes(nodes):
+    try:
+        NODES_JSON_PATH.parent.mkdir(parents=True, exist_ok=True)
+        with NODES_JSON_PATH.open("w") as f:
+            json.dump(nodes, f, indent=4)
+    except (IOError, OSError) as e:
+        sys.exit(f"Error writing to {NODES_JSON_PATH}: {e}")
+
+def add_node(name: str, ip: str):
+    nodes = read_nodes()
+    if any(node['name'] == name for node in nodes):
+        print(f"Error: A node with the name '{name}' already exists.", file=sys.stderr)
+        sys.exit(1)
+    if any(node['ip'] == ip for node in nodes):
+        print(f"Error: A node with the IP '{ip}' already exists.", file=sys.stderr)
+        sys.exit(1)
+    
+    nodes.append({"name": name, "ip": ip})
+    write_nodes(nodes)
+    print(f"Successfully added node '{name}' with IP '{ip}'.")
+
+def delete_node(name: str):
+    nodes = read_nodes()
+    original_count = len(nodes)
+    nodes = [node for node in nodes if node['name'] != name]
+    
+    if len(nodes) == original_count:
+        print(f"Error: No node with the name '{name}' found.", file=sys.stderr)
+        sys.exit(1)
+
+    write_nodes(nodes)
+    print(f"Successfully deleted node '{name}'.")
+
+def list_nodes():
+    nodes = read_nodes()
+    if not nodes:
+        print("No nodes configured.")
+        return
+        
+    print(f"{'Name':<20} {'IP Address'}")
+    print(f"{'-'*20} {'-'*15}")
+    for node in sorted(nodes, key=lambda x: x['name']):
+        print(f"{node['name']:<20} {node['ip']}")
+
+def main():
+    parser = argparse.ArgumentParser(description="Manage external node configurations.")
+    subparsers = parser.add_subparsers(dest='command', required=True)
+
+    add_parser = subparsers.add_parser('add', help='Add a new node.')
+    add_parser.add_argument('--name', type=str, required=True, help='The unique name of the node.')
+    add_parser.add_argument('--ip', type=str, required=True, help='The IP address of the node.')
+
+    delete_parser = subparsers.add_parser('delete', help='Delete a node by name.')
+    delete_parser.add_argument('--name', type=str, required=True, help='The name of the node to delete.')
+
+    subparsers.add_parser('list', help='List all configured nodes.')
+    
+    args = parser.parse_args()
+
+    if args.command == 'add':
+        add_node(args.name, args.ip)
+    elif args.command == 'delete':
+        delete_node(args.name)
+    elif args.command == 'list':
+        list_nodes()
+
+if __name__ == "__main__":
+    main()