FEAT: Support rerank models

[aresnow1]

• Add rerank type
• Compatible with cohere rerank APIs
• Support bge-reranker-large and bge-reranker-base
• Support downloading from modelscope
• Documentation

example for launching rerank model:

model_uid = client.launch_model(
        model_name="bge-reranker-large", model_type="rerank"
    )
model = client.get_model(model_uid)
query = "A man is eating pasta."
corpus = [
    "A man is eating food.",
    "A man is eating a piece of bread.",
    "The girl is carrying a baby.",
    "A man is riding a horse.",
    "A woman is playing violin.",
    "Two men pushed carts through the woods.",
    "A man is riding a white horse on an enclosed ground.",
    "A monkey is playing drums.",
    "A cheetah is running behind its prey.",
]
print(model.rerank(corpus, query))

[codingl2k1]

LGTM