Import 9 alphaear finance skills

- alphaear-deepear-lite: DeepEar Lite API integration
- alphaear-logic-visualizer: Draw.io XML finance diagrams
- alphaear-news: Real-time finance news (10+ sources)
- alphaear-predictor: Kronos time-series forecasting
- alphaear-reporter: Professional financial reports
- alphaear-search: Web search + local RAG
- alphaear-sentiment: FinBERT/LLM sentiment analysis
- alphaear-signal-tracker: Signal evolution tracking
- alphaear-stock: A-Share/HK/US stock data

Updates:
- All scripts updated to use universal .env path
- Added JINA_API_KEY, LLM_*, DEEPSEEK_API_KEY to .env.example
- Updated load_dotenv() to use ~/.config/opencode/.env

skills/alphaear-signal-tracker/scripts/tools/__init__.py

@@ -0,0 +1,24 @@
+# src/tools/__init__.py
+"""
+AlphaEar 工具包层 - Agno Toolkit 适配器
+
+提供的 Toolkit 类：
+- NewsToolkit: 热点新闻获取
+- StockToolkit: 股票搜索与价格查询
+- SentimentToolkit: 情绪分析
+- SearchToolkit: 网络搜索
+"""
+
+from .toolkits import (
+    NewsToolkit,
+    StockToolkit,
+    SentimentToolkit,
+    SearchToolkit,
+)
+
+__all__ = [
+    "NewsToolkit",
+    "StockToolkit",
+    "SentimentToolkit",
+    "SearchToolkit",
+]