[BMSON] Weird multiplex subtitles like sonorous origin

<img width="1920" height="1080" alt="Image" src="https://github.com/user-attachments/assets/52a9c290-a5cb-4a2d-a136-d2b614d15576" />

https://hitkey.nekokan.dyndns.info/cmds.htm#SUBTITLES

just instead uses end of line `\n`

<img width="1632" height="98" alt="Image" src="https://github.com/user-attachments/assets/47d1f380-4300-4e75-812f-5a2747946bb7" />