add plugin to eslint which adds error when DomainObject.nested is not set and def has nested types

[uladkasach]

we want this plugin to be generic, so that other errors/warns can be added

side note: eventually we will want to add the decorate() option of adding this data to it

the message should explain that without doing this:

• serialize and getUniqueIdentifier will throw errors in some cases and silent bugs in others (i.e., very dangerous)