Move conformance-auth-client to scripts/conformance/

Same treatment as the unified conformance client: this is CI test
infrastructure, not a user-facing example. Moved to
scripts/conformance/auth-client.py and removed as a workspace member.

Author: maxisbey

examples/clients/conformance-auth-client/README.md

@@ -32,6 +32,8 @@
 from urllib.parse import parse_qs, urlparse
 
 import httpx
+from pydantic import AnyUrl
+
 from mcp import ClientSession
 from mcp.client.auth import OAuthClientProvider, TokenStorage
 from mcp.client.auth.extensions.client_credentials import (
@@ -41,7 +43,6 @@
 )
 from mcp.client.streamable_http import streamable_http_client
 from mcp.shared.auth import OAuthClientInformationFull, OAuthClientMetadata, OAuthToken
-from pydantic import AnyUrl
 
 
 def get_conformance_context() -> dict[str, Any]: