feat: simplify RBAC roles and remove dev role switcher

- Simplified RBAC system to two roles: super_admin and user.
- Removed tenant_admin and rp_admin roles across backend and frontend.
- Removed Dev Role Switcher feature from adminfront.
- Updated all handlers, middlewares, and navigation to reflect the new role model.
- Fixed backend build errors and updated tests.

backend/internal/handler/relying_party_handler.go

@@ -48,7 +48,7 @@ func (h *RelyingPartyHandler) ListAll(c *fiber.Ctx) error {
 
 	if role == domain.RoleSuperAdmin {
 		rps, err = h.Service.ListAll(c.Context())
-	} else if role == domain.RoleTenantAdmin && profile.TenantID != nil {
+	} else if role == "tenant_admin" && profile.TenantID != nil {
 		rps, err = h.Service.List(c.Context(), *profile.TenantID)
 	} else {
 		slog.Warn("Forbidden access to all applications", "userID", profile.ID, "role", role)