docs(admin): add 66 Administration and Master Data wiki articles Covers all 8 sections: user management, roles/privileges, organisation hierarchy, staff master data, OPD service/item configuration (all listing modes + fee layers), fee configuration (base/site/dept/CC fees, fee types, speciality/staff fees, batch vs individual bill linking), application configuration (4 scopes), and audit/approval workflows. Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

buddhika75 committed May 18, 2026