feat(skill): 从 opencli 适配器提炼平台搜索知识，更新 smart-search

[bigbrother666sh]

• 新增 Cookie 预热章节：明确 8 个需要先访问主页的平台（知乎/Reddit/微博/YouTube/雪球/路透社/Bilibili/小红书）
• 修复小红书 source 参数：web_explore_feed → web_search_result_notes，补充 wait+滚动说明
• 新增 Twitter/X 等待时间提示：导航后需等待 5 秒
• 新增 Reddit 搜索 URL（全站 & subreddit，含 sort/time 过滤）
• 新增 LinkedIn 搜索（职位/人员/公司）
• 新增雪球股票搜索、HackerNews/V2EX、路透社新闻搜索章节

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