[Feature Request] Expose plan usage data in statusLine JSON input

Bug Description
plan usage data (session %, weekly %) is not currently available in the statusLine JSON input. The statusLine only has access to:

• cost.total_cost_usd - API cost for the current conversation
• context_window - token counts and context % remaining
• model - current model info
• workspace - directory info

The plan quota information (50% session used, 19% weekly used, etc.) shown in /usage is not exposed to custom status lines. This would be a good feature request to submit via /feedback - asking Anthropic to include plan usage data in the statusLine input JSON.

Environment Info

• Platform: darwin
• Terminal: tmux
• Version: 2.1.15
• Feedback ID: 9a010fba-ca88-4f54-951b-908858fd5780