Adding model card to each AI API

[dhuynh95]

BlindAI will provide managed AI APIs.
For transparency it would be good to register on the Client Python SDK information about each model we use behind the scenes, for instance a link to the build process that was used to serve a specific model.

For instance, we could have something like:

import blindai

card = blindai.api.get_model_card("whisper", tee="sgx")
card.model_hash
>> "77af778b51abd4a3c51c5ddd97204a9c3ae614ebccb75a606c3b6865aed6744e"

card.build_process_link
>> "github.com/..."

Not top prio but could be cool for transparency.