feat(library): use configurable max upload size limit

Replace the hardcoded 500MB limit with a dynamic value from the application
settings to allow uploading files larger than 500MB.

Closes #550

packages/types/src/app-info.ts

@@ -3,4 +3,5 @@ export interface AppInfoResponse {
   updateAvailable: boolean | null;
   latestVersion: string | null;
   bookDockPath: string;
+  maxUploadSizeMb: number;
 }