搜索工具调研与安装：neo-ddg-search已安装并集成到学习机制

- 创建search-tool-research.md：记录clawdhub搜索工具调研
- 安装neo-ddg-search：DuckDuckGo Web Search，免费无需API密钥
- 更新learning-notes.md：添加搜索工具学习和clawdhub使用
- 添加工具学习启发：开源优先、多工具备选、持续学习工具
- 更新今日指标：+1搜索工具、+2学习相关文档
- 承诺：使用neo-ddg-search支持自主学习和资料收集

skills/neo-ddg-search/scripts/search.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+"""DuckDuckGo web search. Usage: search.py "query" [count]"""
+import sys
+from ddgs import DDGS
+
+query = sys.argv[1] if len(sys.argv) > 1 else ""
+count = int(sys.argv[2]) if len(sys.argv) > 2 else 5
+
+if not query:
+    print("Usage: search.py 'query' [count]", file=sys.stderr)
+    sys.exit(1)
+
+try:
+    results = list(DDGS().text(query, max_results=count))
+    if not results:
+        print("No results found.")
+    for i, r in enumerate(results, 1):
+        print(f"\n[{i}] {r.get('title','')}")
+        print(f"    {r.get('href','')}")
+        print(f"    {r.get('body','')}")
+except Exception as e:
+    print(f"Error: {e}", file=sys.stderr)
+    sys.exit(1)