Feature Request: Expose usage quota in status line JSON

Summary

Please expose Claude Max usage quota information in the JSON data sent to custom status line commands.

Current Behavior

The status line JSON includes useful data like:

• session_id
• model info
• context_window tokens
• cost data

But it does not include the Claude Max usage quota (percentage used in current window, reset time).

Requested Behavior

Add fields to the status line JSON like:

{
  "usage_quota": {
    "percentage_used": 13,
    "reset_time": "2025-12-30T19:00:00Z",
    "plan": "max"
  }
}

Use Case

Users with custom status lines want to see their usage quota at a glance without running /usage manually. This would enable status lines like:

project (main) [Opus 4.5] [Max] [13% · resets 7pm] [████░░░░░░ 85%] 04:30:15

Workaround Attempted

Currently there's no way to get this info programmatically - it's only available via the /usage slash command which can't be invoked from hooks or scripts.

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