Add Replicate demo and API

[chenxwh]

trafficstars

Hey @vinthony ! 👋

This pull request makes it possible to run your model inside a Docker environment with an open-source tool called Cog.

Then the model can be run on a Replicate web page: view it here: hhttps://replicate.com/cjwbw/sadtalker Replicate also have an API, so people can easily run your model from their code:

import replicate
model = replicate.models.get("cjwbw/sadtalker")
model.predict(source_image=...)

We would also like to transfer the ownership of the demo to OpenTalker so you can modify and update the page easily, let me know!