Feature Request

Feature description

Add an optional parameter to the constructor containing the data directory. If absent the directory defaults to __dirname/data.

Around line 5814 add: this.dataDir = options.dataDir || "__dirname/data";
Change the 15 lines containing __dirname accordingly.

This change is useful because in an ElectronJS application bundled by Vite the __dirname points to dist-electron but the data dir is /node_modules/pdfkit/js/data and haven't found a way to relocate it to dist-electron.

Thanks!