Similar to @PersistedName for fields (see #590), we should provide the option of mapping Kotlin class names to their underlying (persisted) name.

@PersistedName(name = "myPersistedName")
class Example : RealmObject {
    // ...
}

Other API's will also be affected by this:

• RealmClass should return the persisted name, not the public (Kotlin) name.
• RQL queries should support both the persisted and public names.

TODO:

// Step 1

[ ] Add a CLASS annotation target to PersistedName.kt.
[ ] Modify AccessorModifierIrGeneration.modifyPropertiesAndCollectSchema to account for persisted values (perhaps no changes needed here).
[ ] Modify RealmModelSyntheticPropertiesGeneration (see addSchemaMethodBody() where irClass.name.identifier is used, maybe other places as well).
[ ] Validate that persisted and public names are a unique in the Realm. They are not allowed to overlap. This check should happen at compile time.
[ ] Verify in Realm Studio that schema is modified correctly.

// Step 2

[ ] Make sure that RealmClass returns the persisted name, not the public (Kotlin) name in the model class.

// Step 3

[ ] Verify that queries can use both persisted and public names in queries.