feat: parsec ci should accept multiple tickets

## Summary

`parsec ci 116 119` fails with "unexpected argument". Currently only one ticket can be checked at a time.

## Proposed Behavior

```bash
# Check CI for multiple tickets at once
parsec ci 116 119 121

# Watch all
parsec ci 116 119 --watch
```

Display results stacked or in a combined table.

## Context

When working on multiple PRs in parallel, checking CI one-by-one is inconvenient.