Ramp: Manage bills

Act on vendor bills and invoices: locate a bill, review the details needed to decide, then approve or reject it. Use when: 'approve this bill', 'reject this bill', 'show me bills pending my approval', 'draft bill details', 'what changed on this bill'. Do NOT use for: read-only payment status checks such as 'did we pay X' (use ramp-payment-lookup), uploading vendor documents (use ramp-manage-vendors), or a cross-product approval queue spanning transactions and reimbursements (use ramp-approval-dashboard).