**Requirements**
[] Implement behind feature flag
[] If parameter has the property of 'Suggested values' in TemplateData, the values are displayed using the OOUI widget: //**ComboBoxInputWidget (filtering on input)**//
[] Users can add a value not included in suggested values. If a user does this, display the following message after clicking out of the widget: "This is not one of the suggested values and may not work with the template." This is displayed using OOUI widget: //**FieldLayout with notice message**//
[] Ensure both of the above requirements work on mobile
**Mocks**
{F33997626}
**Related tickets**
- Discussion about OOUI combobox widget {T271399}
- Implementation on test instance {T260157}
Relevant prototype commits:
* https://gitlab.com/wmde/mediawiki-extensions-VisualEditor/-/commit/cc6ba335263f141b740202634aec483572b66cd1
* https://gitlab.com/wmde/mediawiki-extensions-VisualEditor/-/commit/c970b78788f6c775c757e5d3cf98fffd0bf91268