Feature request: expose Pro plan daily/weekly usage limits in status line JSON payload

Feature Request

It would be great if the status line JSON payload included data about the current Pro plan usage limits — specifically how much of the daily and weekly allowance has been used.

Use case

The Claude Code status line is a great place to surface session metadata (context %, model, git branch, etc.). Right now there's no way to show how close you are to your Pro plan's daily or weekly limit because that data isn't available locally — it only exists server-side.

Being able to show something like Daily: 42% │ Weekly: 18% in the footer would help users self-manage usage and avoid hitting limits mid-session unexpectedly.

Proposed change

Add a usage_limits (or similar) object to the status line JSON payload, e.g.:

{
  "usage_limits": {
    "daily": {
      "used_percentage": 42,
      "resets_at": "2026-04-26T00:00:00Z"
    },
    "weekly": {
      "used_percentage": 18,
      "resets_at": "2026-04-28T00:00:00Z"
    }
  }
}

This would allow status line scripts to surface limit usage alongside other session info, without requiring any additional API calls or web scraping.