chore: update (Polish) translation

Translate-URL: https://librescore.ddns.net/projects/librescore/webmscore-pwa/pl/

src/lib/i18n/pl.json

@@ -1,22 +1,73 @@
 {
-  "ar": "arabski",
-  "cs": "czeski",
-  "de": "niemiecki",
-  "en": "angielski",
-  "es": "hiszpański",
-  "fr": "francuski",
-  "hu": "węgierski",
-  "it": "włoski",
-  "ja": "japoński",
-  "ko": "koreański",
-  "ms": "malajski",
-  "nl": "niderlandzki",
-  "pl": "polski",
-  "pt": "portugalski",
-  "ru": "rosyjski",
-  "tr": "turecki",
-  "zh-Hans": "chiński uproszczony",
-  "webmscore": "Webmscore",
-  "id": "indonezyjski",
-  "zh-Hant": "chiński tradycyjny"
+    "ar": "arabski",
+    "cs": "czeski",
+    "de": "niemiecki",
+    "en": "angielski",
+    "es": "hiszpański",
+    "fr": "francuski",
+    "hu": "węgierski",
+    "it": "włoski",
+    "ja": "japoński",
+    "ko": "koreański",
+    "ms": "malajski",
+    "nl": "niderlandzki",
+    "pl": "polski",
+    "pt": "portugalski",
+    "ru": "rosyjski",
+    "tr": "turecki",
+    "zh-Hans": "chiński uproszczony",
+    "webmscore": "Webmscore",
+    "id": "indonezyjski",
+    "zh-Hant": "chiński tradycyjny",
+    "dismiss": "",
+    "export_to_label": "",
+    "no_options": "",
+    "midi_note": "",
+    "mscx_note": "",
+    "mscz_note": "",
+    "mxl_option": "",
+    "musicxml_option": "",
+    "xml_option": "",
+    "midi_expand_repeats_option": "",
+    "midi_export_rpns_option": "",
+    "musicxml_filetype_label": "",
+    "draw_page_background_option": "",
+    "png_transparent_background_option": "",
+    "png_note": "",
+    "positions_measures_option": "",
+    "positions_segments_option": "",
+    "positions_of_label": "",
+    "svg_note": "",
+    "language": "",
+    "theme": "",
+    "no_file_metadata": "",
+    "no_file_loaded": "",
+    "unknown_error": "",
+    "positions": "",
+    "metadata": "",
+    "full_score": "",
+    "all_supported_files": "",
+    "musescore_files": "",
+    "musicxml_files": "",
+    "midi_files": "",
+    "musedata_files": "",
+    "capella_files": "",
+    "bb_files": "",
+    "overture_score_writer_files": "",
+    "bagpipe_music_writer_files": "",
+    "guitar_pro_files": "",
+    "power_tab_editor_files": "",
+    "musescore_backup_files": "",
+    "experimental": "",
+    "invalid_file_extension_error": "",
+    "invalid_export_target_error": "",
+    "select_files_label": "",
+    "convert_label": "",
+    "download_label": "",
+    "what_to_export": "",
+    "description": "",
+    "audio_note": "",
+    "select_all_label": "",
+    "clear_selection_label": "",
+    "export_options": ""
 }