Make extension icons in-house
Created by: AbdullahM0hamed
Why?
• Uniformity • All extensions actually get icons (See: NovelFull & VolareNovels) • Some extension icons get improved quality (See: BestLightNovel & ReadLightNovel)
If you think this PR is not at all worthwhile, feel free to just close it. If you think it is, but that some icons in this PR are simply not good enough, feel free to mention/change those