Extends the scimitar gem with Role-Based Access Control (RBAC) resources for SCIM v2, based on the NIST RBAC standard and the Baumer et al. research paper "SCIM: Survey and Enhancement With RBAC" (IEEE Access, 2023). Provides Role, Entitlement, and Application SCIM resource types with full schema definitions, enabling standardized RBAC data exchange via SCIM.