Fix organization model

[joanagmaia]

Changes proposed ✍️

What

🤖 Generated by Copilot at c60d805

Removed required option for name field in organization-model.js to match backend validation. Refactored organization model to use displayName as the visible name.
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🤖 Generated by Copilot at c60d805

name not required
simplifying the model
autumn leaves fall

Why

How

🤖 Generated by Copilot at c60d805

• Removed required option for name field in organization model (link)

Checklist ✅

• Label appropriately with Feature, Improvement, or Bug.
• Add screehshots to the PR description for relevant FE changes
• New backend functionality has been unit-tested.
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.