ВЕРСИИ (3)

Fixed bug: - Cannot record pages added by custom transformers when closing a book. This causes that, when open the book next time, it cannot automatically turn to the last-opened page. New feature: - Allow directly create a `PageDataJS` via static methods `createNew`, `createNewCustom` and `createEmpty`. Java class `PageDataJS` still needs to be loaded manually using `Java.loadClass()`. This is because pages creating via methods above needs more manual operations such as setting their `parent`. So `PageDataJS` is not provided directly by a global constant, to avoid confusing new developers.

Add an `BookTextComponentData` interface to create `TextComponentData`. - `BookTextComponentData.literal(string)` - `BookTextComponentData.of(Component)`

First release. # Contents - Allow adding custom Mantle books. - A new item type `mantle:book`. - Custom book transformers. - Custom page types. - Access for Mantle's built-in book elements.