Improve CLI templates: browser cleanup, env files, and rename advanced sample

[rgarcia]

• Add kernel.browsers.deleteByID() to all templates to properly close live view on exit
• Switch deploy instructions to use --env-file .env instead of inline --env flags
• Add .env.example files for templates requiring API keys
• Remove 'brew install' from Next steps (user already has CLI installed)
• Rename advanced-sample template to captcha-solver (more descriptive)
• Switch from playwright to playwright-core in TypeScript templates
• Update all dependencies to latest versions
• Fix devDependencies in package.json files
• Add DuckDuckGo as starting URL for CUA templates (less captcha friction)
• Clean up stale advanced-sample directory

---

Note

Renames the TS advanced sample to captcha-solver, standardizes templates on playwright-core with proper browser cleanup, adds .env examples, updates dependencies, and improves CUA defaults.

• Templates:
  • Rename typescript/advanced-sample to typescript/captcha-solver; remove old files and add new index.ts with app name ts-captcha-solver.
  • Switch all TS templates to playwright-core imports (captcha-solver, computer-use, cua, sample-app, stagehand, magnitude).
• Browser lifecycle:
  • Add kernel.browsers.deleteByID(...) and ensure try/finally-based cleanup after browser.close() across templates (captcha-solver, computer-use, cua).
• Environment & config:
  • Add .env.example files for API keys in computer-use, cua, gemini-cua, magnitude, stagehand.
• CUA UX:
  • Start navigation at DuckDuckGo to reduce CAPTCHAs in cua/index.ts.
• Dependencies:
  • Bump @onkernel/sdk to ^0.23.0 and update related deps (openai, @anthropic-ai/sdk, @browserbasehq/stagehand, luxon, typescript, @types/node, etc.).
  • Replace playwright with playwright-core in package.json; add dev deps (typescript, @types/node).
  • Add/update pnpm-lock.yaml files for templates.

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[archandatta]

lgtm!