avniproject/avni-client#1690 | feat: migrate Realm schemas to v12 syntax

- Update 36 schema files with 73 property definitions
- Convert object references to explicit format
- Change: propertyName: 'TypeName' → { type: 'object', objectType: 'TypeName' }
- All schemas validated and tests passing

BREAKING CHANGE: Requires Realm v12+ in consuming applications

avniproject/avni-client#1690 | fix: update scripts to support Node v1…

…0 by replacing String.matchAll with regex.exec loops