Feature: Add animekai.to Source (Replacement for Gogoanime)

Gogoanime is useless now. Please add **`animekai.to`** as a new source. `animekai.to` is a highly viable replacement because it has: * both **Sub and Dub**. * these **360p, 720p, 1080p resolutions**. <img width="1053" height="572" alt="Image" src="https://github.com/user-attachments/assets/4e1b756e-5ba8-4f54-b268-20806975ec0d" /> Integrating this source will significantly enhance the tool's reliability.