feat: init nofxi - AI Trading Agent module

NOFXi — Your AI Trading Agent, built on NOFX.

Architecture:
- Agent Core: intent routing, conversation memory, trade confirmation
- Memory: SQLite (trades, conversations, preferences, strategies)
- Thinking: LLM client (OpenAI/claw402/DeepSeek compatible)
- Execution: Bridge to NOFX trader engine (9 exchanges)
- Perception: Market monitor, price alerts, anomaly detection
- Interaction: Telegram bot + REST API + OpenAI-compatible endpoint

Features:
- Natural language trading (中英文)
- /buy /sell /analyze /watch /alert /positions /balance
- Daily P/L reports, portfolio risk checks
- Trade confirmation flow (safety first)
- Price polling and alert notifications

nofxi/LICENSE

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+Proprietary License
+
+Copyright (c) 2026 NoFxAiOS. All rights reserved.
+
+This software and associated documentation files (the "Software") are the
+proprietary property of NoFxAiOS. No part of this Software may be reproduced,
+distributed, or transmitted in any form or by any means without the prior
+written permission of NoFxAiOS.
+
+Unauthorized copying, modification, distribution, or use of this Software,
+via any medium, is strictly prohibited.
+
+For licensing inquiries, contact: https://github.com/NoFxAiOS