Brave — keyword web search over Brave's own independent index (not Google/Bing). Pass `q`; optional `count` (1-20), `offset` (pagination), `country` (2-letter), `search_lang`, `freshness` (pd|pw|pm|py or YYYY-MM-DDtoYYYY-MM-DD), `safesearch`, `result_filter` (comma list: web,news,videos,faq,discussions), `extra_snippets` (up to 5 alternative excerpts per hit). Returns ranked results with snippets