Generated and hand-written types for ISO 20022 financial messages.

Feature flags

Each message family is behind a feature flag:

• head — Business Application Header (head.001)
• pacs — Payments Clearing and Settlement (pacs.002, pacs.004, pacs.008, pacs.009, pacs.028) at their current versions
• legacy-pacs — older pacs versions still in active use (pacs.002.001.10/12, pacs.008.001.08/10); implies pacs
• pain — Payment Initiation
• camt — Cash Management
• all — enables all families (including legacy-pacs)