eml upload: No sender information in note

Hi again,

in the generated note the e-mail sender is missing. It would be great if this could be added in the generated note. In the upload preview the sender information is shown. I've attached 2 screenshots.

**Possible solution which also would make the note look more "mail-ish" ;-)**

Just add a block with some e-mail-metadata before the message body, e.g.

```
---
From: Margret Ludwig
To: Beirat hausverwaltung
Subject: Protokoll der letzten Sitzung
Date: 17. November 2022 um 16:40:21 MEZ
---

... here comes the message body, attachments, etc. ...
```

Maybe this could be activated/deactivated in the plugin preferences. Just some thoughts...

Best regards from Putzbrunn, Germany,
Christian