## Summary
This PR adds two new optional boolean fields to `ThreadOptions` in the
TypeScript SDK:
- **`networkAccess`**: Enables network access in the sandbox by setting
`sandbox_workspace_write.network_access` config
- **`webSearch`**: Enables the web search tool by setting
`tools.web_search` config
These options map to existing Codex configuration options and are
properly threaded through the SDK layers:
1. `ThreadOptions` (threadOptions.ts) - User-facing API
2. `CodexExecArgs` (exec.ts) - Internal execution args
3. CLI flags via `--config` in the `codex exec` command
## Changes
- `sdk/typescript/src/threadOptions.ts`: Added `networkAccess` and
`webSearch` fields to `ThreadOptions` type
- `sdk/typescript/src/exec.ts`: Added fields to `CodexExecArgs` and CLI
flag generation
- `sdk/typescript/src/thread.ts`: Pass options through to exec layer
## Test Plan
- [x] Build succeeds (`pnpm build`)
- [x] Linter passes (`pnpm lint`)
- [x] Type definitions are properly exported
- [ ] Manual testing with sample code (to be done by reviewer)
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Co-authored-by: Claude <noreply@anthropic.com>
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