Direct download and Malware scan

### Feature Description

Direct download with using
` /pp install http[s]://domain.tld/download/plugin.jar`
For the pro version also saving the .jar in temp, with no run rights for anyone and running it to a virus scanner like virustotal. Also filter to only support .jars

### Why is this feature needed?

Usefull if the Db doesnt have your plugin.

### Additional Info

_No response_