Added Animekai and kisskh decoders

[Toasty360]

What kind of change does this PR introduce?

• Added decoders for Megaup and kisskh.
• Fixed Zoro WASM implementation and added tests for it.

[riimuru]

Hey, Thank you for the PR. Is the extractor done? I don't see the class that conforms VideoExtractor.

[Toasty360]

@riimuru I modified megaup (animekai); now it extends VideoExtractor. However, the kisskh extractor only generates the kkey. Should I move it to the utils folder?

[riimuru]

@Toasty360 You don't have to move Kisskh to the utils folder; it's all good. However, I still can't see where megaup extends VideoExtractor. Perhaps you forgot to push it?

[Toasty360]

@riimuru You can merge it now. I fixed Zoro issue in this PR. @2004durgesh I added those lines of code you requested.

[riimuru]

@Toasty360 Thank you!