and code changes:
``` Add natural language scheduling, docs, wizard, and branding
- Add SET SCHEDULE natural language parser supporting patterns like
"every hour", "at 9am", "weekdays at 8am", "business
This commit replaces all hardcoded message type integers (0, 1, 2, 3, 4,
5) with named constants from a new MessageType module, improving code
readability and maintainability across the codebase.
