[coalesce-vue-vuetify] Add a component for selecting a string value from the fields of another model

[ascott18]

This is quite similar to c-select-string-value, and could be implemented with different parameters on this existing component.

The key difference is that c-select-string-value selects from a custom static string[]-returning method, This new function would select from the list?fields=x endpoint of an existing type, and use that type's existing search behavior. It would also have the option to either allow or disallow user input of custom values that do not appear in the API response.