fix: Race conditions when adding many library items (#10013)

* Fix for race condition when adding many library items

* Remove unused import

* Replace any with LibraryItem type

* Fix comments on pr

* Fix build errors

* Fix hoisted variable

* new mime type

* duplicate before passing down to be sure

* lint

* fix tests

* Remove unused import

---------

Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>

packages/excalidraw/data/library.ts

@@ -192,6 +192,7 @@ const createLibraryUpdate = (
 class Library {
   /** latest libraryItems */
   private currLibraryItems: LibraryItems = [];
+
   /** snapshot of library items since last onLibraryChange call */
   private prevLibraryItems = cloneLibraryItems(this.currLibraryItems);
 

packages/excalidraw/data/types.ts

@@ -6,6 +6,7 @@ import type { cleanAppStateForExport } from "../appState";
 import type {
   AppState,
   BinaryFiles,
+  LibraryItem,
   LibraryItems,
   LibraryItems_anyVersion,
 } from "../types";
@@ -59,3 +60,7 @@ export interface ImportedLibraryData extends Partial<ExportedLibraryData> {
   /** @deprecated v1 */
   library?: LibraryItems;
 }
+
+export type ExcalidrawLibraryIds = {
+  itemIds: LibraryItem["id"][];
+};