C7-Digital/c7_ledger: AGENTS.md

# AGENTS.md Guidance for AI coding agents (Cursor, Claude Code, Codex, etc.) in the **c7_ledger** monorepo. ## Project overview TypeScript clients for Canton Network services, published to npm under `@c7-digital/*`: | Package | Path | Role | |---------|------|------| | `@c7-digital/ledger` | `ledger