[Feature]: Detect links to PDF files and distinguish them from regular websites

[RobRoyce]

Is your feature request related to a problem? Please describe. Yes. Currently, web links that lead to PDF files are treated as normal websites.

---

Describe the solution you'd like

• PDFs (and possibly other embedded file types) should be detected and treated as files instead of websites.
• User should be able to choose whether the PDF gets downloaded and stored as a file or stored as a normal web link.
• Either way, the icon, title, and other metadata should come from the PDF itself (how?)

---

Describe alternatives you've considered None

---

Additional context None