Add CLI command to check usage and remaining quota

Feature Request

Add a claude usage (or similar) CLI command that shows current usage and remaining quota/rate limits for the authenticated account.

Context

When authenticated via claude auth status, the CLI knows the account, org, and subscription type — but there's no way to check how much of your allocation you've used or what remains without leaving the terminal and checking claude.ai/settings in a browser.

Why it's useful

• Developers working in long sessions want to know if they're approaching limits before hitting them mid-task
• Helps with planning — knowing remaining capacity affects whether to kick off a large agent run or wait
• Keeps the workflow in the terminal where Claude Code lives

Current workaround

Navigate to claude.ai/settings in a browser — breaks flow.

🤖 Generated with Claude Code