Feature request: Option to hide organization name from startup display

Feature Request

Summary: Add a setting to hide or suppress the organization name line (e.g., "user@example.com's Organization") that appears during Claude Code startup.

Problem: When logged in under an organization account, the org identifier is always displayed at startup. Some users (especially solo developers or personal-use orgs) find this unnecessary clutter and would prefer a cleaner startup experience.

Proposed solution: Add a user-configurable setting (e.g., hideOrgDisplay or showOrganization: false) in settings.json or settings.local.json to suppress the organization line from the startup display. This would be a cosmetic preference and would not affect authentication or org-level policies.

Workarounds: Currently, the only ways to avoid this are switching to a personal/non-org account or authenticating via API key, neither of which may be desirable for users who need org-level plan features.