Implement ETC2 Transcoding support#417
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Initially will be only for android were you can enable ETC2 transcoding during mod installs if the gpu lacks S3TC or BC7 support.
Latter this will be used to be able to transcode in your PC and transfer mods already transcoded to an android version of knossos.
Thats why the library needs to be present in desktop OS as well.
On Android Knossos will detect GPU capabilities and enable transcoding by default. It is also smart enoght to know to only transcode S3TC and/or BC7 depending on hardware support. Configuration can be done on the globalsettings page.
The transcoding process algo patches .eff files to change the $type to ktx if its frames has been transcoded.
Uncompressed DDS files are completely ignored in the process because there is a chance they could be used for the 2D UI system were compressed image assets arent supported.
Im still missing the MacOS versions of "etc2native", but those can be added later at any point.