Add Custom Field for Multi-Select Based on Format (RJSF Limitation)

[linear]

Currently, we are rendering a multi-select field based on the format property. However, RJSF does not support multi-select rendering via format, which leads to incorrect behavior and warnings.

To fix this, we need to introduce a custom field/component to explicitly handle multi-select inputs instead of relying on format.

Current behavior

• Multi-select is inferred from format
• RJSF does not officially support this pattern
• Results in inconsistent rendering and potential console warnings