Add support for RealmConfiguration.initialData()

[sync-by-unito]

Similar to Realm Java we should add support for easily adding data to new Realm files through an initial write transaction. This should be triggered if this is the first time the Realm file is opened (i.e. no file exists on disk). Configuring an asset file at the same time should be an error.

Suggested API:

RealmConfiguration.Builder.initialData(transaction: MutableRealm.() -> Unit)

[sync-by-unito]

➤ Christan Melchior commented:

This was added in 1.0.0