New src/cli/format-event.ts handles formatting OpenCode JSONL events:
- step_start: skip in normal mode, show in debug
- text: display as-is
- tool_use: show errors, skip in normal mode
- step_finish: show message + tokens/cost in debug
- error: display error message
Exports cliAdapter.formatStdoutEvent for Paperclip UI to call.
Also fixes ui-parser.ts to re-export from format-event.ts.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
