Add APKPure Search

[osering]

Right now creating list of apps (adding one by one manually) is not the most convenient one (probably such list could be generated from apps installed on device and user just had to unselect apps which not to include in Obtainium list).
Moreover apps from google store (apkpure, apkmirror, and derivatives alike) cannot be searched - user have to make these searches in web browser and then copy/paste as URL into Obtainium.

Please consider adding/supporting search from inside Obtainium app from these other (at least apkpure with search query like https://apkpure.com/search?q=AFWall) sources or create possibility to add your custom sources.

[ImranR98]

Regarding your first point, it's already been discussed in other issues and isn't something that could realistically be done.