feat(names): strip special characters from file and folder names

re #21

src/backend/src/shared/utils.service.ts

@@ -12,7 +12,11 @@ export class UtilsService {
       __dirname,
       '..',
       this.configService.get<string>(EnvironmentEnum.DOWNLOADS_PATH),
-      name,
+      this.stripFileIllegalChars(name),
     );
   }
+
+  stripFileIllegalChars(text: string): string {
+    return text.replace(/[/\\?%*:|"<>]/g, '-');
+  }
 }

src/backend/src/track/track.service.ts

@@ -131,7 +131,8 @@ export class TrackService {
   }
 
   getTrackFileName(track: TrackEntity): string {
-    return `${track.artist} - ${track.name.replace('/', '')}.${this.configService.get<string>(EnvironmentEnum.FORMAT)}`;
+    const fileName = `${track.artist} - ${track.name.replace('/', '')}`;
+    return `${this.utilsService.stripFileIllegalChars(fileName)}.${this.configService.get<string>(EnvironmentEnum.FORMAT)}`;
   }
 
   getFolderName(track: TrackEntity, playlist: PlaylistEntity): string {