feat: add user setup flow behind feature flag

[facundo-herodevs]

Summary

• Added a user-setup flow that runs after hd auth login to check status and complete setup via EOL GraphQL.
• Introduced a retry helper and consistent GraphQL error extraction to align with existing NES client error handling.
• Gated the feature behind ENABLE_USER_SETUP.
• Updated Biome schema version in biome.json.

Key Changes

• New GraphQL operations: userSetupStatus query and completeUserSetup mutation.
• New client: src/api/user-setup.client.ts with status + completion logic and retries.
• Feature flag: config.enableUserSetup sourced from ENABLE_USER_SETUP.
• Shared helper: src/api/graphql-errors.ts for Apollo error normalization.
• Tests updated for login flow and user-setup retry behavior.

Notes

• User setup only runs when ENABLE_USER_SETUP=true.
• Failures after retries surface “Please contact your administrator.”