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>

frontend/src/lifetime/input.ts

@@ -169,6 +169,9 @@ export function createInputManager(editor: EditorState, container: HTMLElement,
 	};
 
 	const onBeforeUnload = (e: BeforeUnloadEvent) => {
+		const activeDocument = document.state.documents[document.state.activeDocumentIndex];
+		if (!activeDocument.is_saved) editor.instance.trigger_auto_save(activeDocument.id);
+
 		// Skip the message if the editor crashed, since work is already lost
 		if (editor.instance.has_crashed()) return;