We should add a new custom field type for dates to increase the adoption of custom fields and empower users with more field types.
### DoD
- [ ] Users can configure a "Date" custom field type like the current custom fields. Only one date can be provided.
- [ ] The Kibana timezone setting is taken into account.
- [ ] Users can specify if the field is required and provide a default value. Validation will apply to the default value to verify that the value is a valid date.
- [ ] Users can set the Date field type when creating a case. Validation will apply to verify that the value is a valid date.
- [ ] Users can edit the Date field type when viewing a case. Validation will apply to verify that the value is a valid date.
We should add a new custom field type for dates to increase the adoption of custom fields and empower users with more field types.