feat(nowcoder): add 牛客网 adapter with 16 commands

[Cosmostima]

Description

Add adapters for 牛客网 (Nowcoder), China's leading tech job-seeking and interview preparation community with millions of active users. Supports hot searches, trending posts, interview experiences, referral codes, salary reports, practice questions, and full-text search.

The adapter covers 16 commands across two strategy tiers:

• 7 Public commands (Strategy.PUBLIC, no browser, ~1s) for publicly accessible data
• 9 Cookie commands (browser required, ~7s) for authenticated content

Note: cli-manifest.json is not included as it is regenerated locally via npm run build and would pull in environment-specific paths.

Type of Change

• 🐛 Bug fix
• ✨ New feature
• 🌐 New site adapter
• 📝 Documentation
• ♻️ Refactor
• 🔧 CI / build / tooling

Commands

Command	Strategy	Description
opencli nowcoder hot	Public	Hot search ranking
opencli nowcoder trending	Public	Trending posts
opencli nowcoder topics	Public	Hot discussion topics
opencli nowcoder recommend	Public	Recommended feed
opencli nowcoder creators	Public	Top content creators leaderboard
opencli nowcoder companies	Public	Hot companies for interview prep
opencli nowcoder jobs	Public	Career category listing
opencli nowcoder search <query>	Cookie	Full-text search (supports type: all/post/question/user/job)
opencli nowcoder suggest <query>	Cookie	Search suggestions
opencli nowcoder experience	Cookie	Interview experience posts
opencli nowcoder referral	Cookie	Internal referral posts
opencli nowcoder salary	Cookie	Salary disclosure posts
opencli nowcoder papers	Cookie	Interview question bank (filterable by company & job)
opencli nowcoder practice	Cookie	Categorized practice questions with progress tracking
opencli nowcoder notifications	Cookie	Unread message summary
opencli nowcoder detail <id>	Cookie	Post detail view (supports ID / UUID / URL)

Technical Notes

• API Gateway: All endpoints go through gw-c.nowcoder.com/api/sparta/ (Spring Boot backend)
• Auth: Public APIs require no credentials and use direct fetch pipeline steps. Cookie-tier APIs navigate to www.nowcoder.com first, then call the gateway with credentials: 'include' inside evaluate to send session cookies.
• Search API: POST-based at /api/sparta/pc/search with JSON body, supports type filtering (all, post, question, user, job)
• Tab Content API: Interview experience (tabId=818), referral (tabId=861), and salary (tabId=858) share the same endpoint /api/sparta/home/tab/content with different tab IDs
• Data Linking: All list commands that return posts include an id field (UUID), enabling drill-down via opencli nowcoder detail <id>
• HTML Stripping: Search and detail commands strip HTML tags from rich-text content for clean CLI output
• Error handling: API failures throw Error with the server-side message (d.msg), surfaced by the pipeline evaluate step

Files

File	Purpose
clis/nowcoder/hot.js	Hot search ranking (Public)
clis/nowcoder/trending.js	Trending posts (Public)
clis/nowcoder/topics.js	Hot discussion topics (Public)
clis/nowcoder/recommend.js	Recommended feed (Public)
clis/nowcoder/creators.js	Top content creators leaderboard (Public)
clis/nowcoder/companies.js	Hot companies for interview prep (Public)
clis/nowcoder/jobs.js	Career category listing (Public)
clis/nowcoder/search.js	Full-text search with type filtering (Cookie, POST API)
clis/nowcoder/suggest.js	Search suggestions (Cookie, POST API)
clis/nowcoder/experience.js	Interview experience posts (Cookie, tabId=818)
clis/nowcoder/referral.js	Internal referral posts (Cookie, tabId=861)
clis/nowcoder/salary.js	Salary disclosure posts (Cookie, tabId=858)
clis/nowcoder/papers.js	Interview question bank by company & job (Cookie, POST API)
clis/nowcoder/practice.js	Categorized practice questions with progress (Cookie)
clis/nowcoder/notifications.js	Unread message summary (Cookie)
clis/nowcoder/detail.js	Post detail view, supports ID / UUID / URL (Cookie)
docs/adapters/browser/nowcoder.md	Adapter documentation page
docs/adapters/index.md	Added row to Browser Adapters table
docs/.vitepress/config.mts	Added sidebar entry

Checklist

• I ran the checks relevant to this PR
• I updated tests or docs if needed
• I included output or screenshots when useful

Verification

• npx tsc --noEmit passes
• npm test passes (203 files, 1548 tests, 0 failures)
• opencli validate passes (602 commands, 0 errors)
• All 16 commands tested with real output via opencli nowcoder <cmd> -f json

Code Quality

• Used positional args for the command's primary subject (query, id)
• Normalized expected adapter failures to Error with server message
• English column names throughout
• cli() API format with proper args array syntax
• All post-list commands include id for drill-down to detail
• HTML tags stripped from rich-text content

Documentation

• Added doc page under docs/adapters/browser/nowcoder.md
• Updated docs/adapters/index.md table
• Updated sidebar in docs/.vitepress/config.mts
• Updated README.md / README.zh-CN.md when command discoverability changed