Implement IndexedDB document auto-save (#422)

* removed all use of document indicies

* -add u64 support for wasm bridge

* fixed rust formating

* Cleaned up FrontendDocumentState in js-messages

* Tiny tweaks from code review

* - moved more of closeDocumentWithConfirmation to rust
- updated serde_wasm_bindgen to add feature flag

* working initial auto save impl

* auto save is a lifetime file

* - cargo fmt
- fixc error message
- move document version constant

* code review round 1

* generate seed for uuid in js when wasm is initialized

* Resolve PR feedback

* Further address PR feedback

* Fix failing test

Co-authored-by: Keavon Chambers <keavon@keavon.com>
Co-authored-by: otdavies <oliver@psyfer.io>

editor/src/document/movement_handler.rs

@@ -6,7 +6,6 @@ use crate::{
 	input::{mouse::ViewportBounds, mouse::ViewportPosition, InputPreprocessor},
 };
 use graphene::document::Document;
-use graphene::layers::style::ViewMode;
 use graphene::Operation as DocumentOperation;
 
 use glam::DVec2;