Split HDRi and PBR texture libraries (specify two folder locations in the preferences)

[Hologram]

Is your feature request related to a problem? Please describe.
For me it would be more convenient to have two file paths for the addon, one for HDRi's and one for PBR material textures. I am usually looking for one or the other, so it would make it easier to find the files I am looking for.

Describe the solution you'd like
Ideally, the addon should expose two folders in the preferences. One for HDRi's and one for PBR material textures. Downloads would then be split between the two folders. Polyhaven, for instance, denotes the assets in its URL:

• https://polyhaven.com/textures
• https://polyhaven.com/hdris

Alternatively, the distinction could be made based on whether the user clicked on import from the Materials tab or the World tab in the properties panel.

So if you could filter the URL for each source to redirect the downloads to their distinct folders, that would be great!