fix(cli): sort sandbox list by timestamp instead of locale date string (#1573)
Fixes #1572
## Problem
`e2b sandbox list` sorted rows *after* converting `startedAt` to a
locale string, so ordering was lexicographic over strings like
`"9/1/2026, 10:00:00 AM"`. In en-US, `"9/..."` sorts after `"10/..."`,
so September sandboxes appeared after October ones — chronological order
broke at any single-digit/double-digit month or day boundary.
## Fix
Sort by the raw `startedAt` timestamp (with the existing sandbox-ID
tiebreak) before formatting for display. The row-building logic is
extracted into an exported `buildTableRows` helper and covered by unit
tests, including the September/October regression case. The input array
is no longer mutated in place.
## Example
```
$ e2b sandbox list --state paused
Paused sandboxes
Sandbox ID ... Started at
sbx-sep ... 9/1/2026, 12:00:00 PM ← previously listed after October
sbx-oct ... 10/1/2026, 11:00:00 AM
```
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Mish Ushakov
4990471484
