Implement P0: SCIM 2.0 Protocol with comprehensive tests

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/spec/src/auth/index.ts

@@ -4,3 +4,4 @@ export * from './policy.zod';
 export * from './protocol';
 export * from './role.zod';
 export * from './organization.zod';
+export * from './scim.zod';