DSH web search

Key features

• mcp__web__search — search the public web and return normalized organic results.
• DDG markup lives in src/dsh_bing_search/providers/ddg.py.
• See the DeepSeek Harness repository.
• mcp__web__search_images — search image indexes and rank results with explainable text scores (see docs/search_images.md).
• mcp__web__open — open a public web page and extract readable text.