feat(phase-4): WS2 + WS3 — Developer Portal (Next.js 14) and CLI tool (sentryagent)

WS2: Developer Portal (portal/)
- Standalone Next.js 14 + Tailwind CSS app — independent deployment
- Home page: hero, feature grid, CTA to /get-started
- /pricing: free tier limits table (10 agents, 1k calls/day) + paid tier CTA
- /sdks: all 4 SDKs (Node.js, Python, Go, Java) with install + code examples
- /api-explorer: Swagger UI from NEXT_PUBLIC_API_URL/openapi.json, persistAuthorization
- /get-started: 4-step wizard (setup → register agent → credentials → SDK snippet)
- Shared Nav component with active-link highlighting
- Build: 8/8 static pages, zero TypeScript errors

WS3: CLI Tool (cli/ — npm package: sentryagent)
- configure, register-agent, list-agents, issue-token, rotate-credentials, tail-audit-log
- Auto OAuth2 token fetch + 30s-buffer cache via client_credentials flow
- chalk-formatted table output, confirmation prompts, bounded audit log dedup
- bash + zsh shell completion scripts
- README with installation, all commands, and completion setup
- Build: tsc clean, node dist/index.js --help verified

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

portal/.next/routes-manifest.json

@@ -0,0 +1 @@
+{"version":3,"pages404":true,"caseSensitive":false,"basePath":"","redirects":[{"source":"/:path+/","destination":"/:path+","internal":true,"statusCode":308,"regex":"^(?:/((?:[^/]+?)(?:/(?:[^/]+?))*))/$"}],"headers":[],"dynamicRoutes":[],"staticRoutes":[{"page":"/","regex":"^/(?:/)?$","routeKeys":{},"namedRegex":"^/(?:/)?$"},{"page":"/_not-found","regex":"^/_not\\-found(?:/)?$","routeKeys":{},"namedRegex":"^/_not\\-found(?:/)?$"},{"page":"/api-explorer","regex":"^/api\\-explorer(?:/)?$","routeKeys":{},"namedRegex":"^/api\\-explorer(?:/)?$"},{"page":"/get-started","regex":"^/get\\-started(?:/)?$","routeKeys":{},"namedRegex":"^/get\\-started(?:/)?$"},{"page":"/pricing","regex":"^/pricing(?:/)?$","routeKeys":{},"namedRegex":"^/pricing(?:/)?$"},{"page":"/sdks","regex":"^/sdks(?:/)?$","routeKeys":{},"namedRegex":"^/sdks(?:/)?$"}],"dataRoutes":[],"rsc":{"header":"RSC","varyHeader":"RSC, Next-Router-State-Tree, Next-Router-Prefetch","prefetchHeader":"Next-Router-Prefetch","didPostponeHeader":"x-nextjs-postponed","contentTypeHeader":"text/x-component","suffix":".rsc","prefetchSuffix":".prefetch.rsc"},"rewrites":[]}