Add: i.media.fi

The current implementation fetches lower-resolution images or WebP-compressed versions from the i.media.fi CDN, used by Savon Sanomat and other Keskisuomalainen media (ksml.fi) sites. We should automatically upgrade these URLs to the maximum available resolution and switch the format to original JPEG for better quality. on site https://www.savonsanomat.fi/paikalliset/3286545 https://i.media.fi/incoming/n5wi3p-aineet.jpg/alternates/WEBP_FREE_960/aineet.jpg or https://i.media.fi/incoming/n5wi3p-aineet.jpg/alternates/FREE_960/aineet.jpg to https://i.media.fi/incoming/n5wi3p-aineet.jpg/alternates/FREE_1440/aineet.jpg or better