version 1.1

Added a shader to the animated Polygon2D that now displays the texture of both sides of the paper pages when they fold over themselves. This significantly improves the visual quality of page animations.

Additional improvements include:

- Further refined preset values for better visual consistency

- Enhanced animation generation for improved overall quality

- Fixed shading on the page interior surfaces

- Implemented a robust BookAPI to delegate interaction handling from other scripts directly to the API

⚠️ **Migration Required:** You need to rebuild everything to work with the new changes. Find the `DynamicFlipPoly` node and press the `rebuild_all` button in the Inspector.