Add `hf_transfer` for faster download

Hey there 👋
Apparently, this space takes a lot of time (~1h?) to initialize as it downloads heavy files at startup. To speed up initialization, you can try to use the new `hf_transfer` lib that should speed up downloads (up to 2x). It is a Rust-based library developed by

@Narsil

that will be integrated in next version of `huggingface_hub`. You can already get it from the `main` branch on Github. It is still experimental so feedback is very welcome here.

You must also set [HF_HUB_ENABLE_HF_TRANSFER=1](https://huggingface.co/docs/huggingface_hub/main/en/package_reference/environment_variables#hfhubenablehftransfer) as environment variable in the Space settings.

Related to [internal slack discussion](https://huggingface.slack.com/archives/C048K60MPNF/p1674067722665209).

requirements.txt

@@ -1,6 +1,10 @@
 --extra-index-url https://download.pytorch.org/whl/cu113
 torch
 torchvision==0.13.1+cu113
+# huggingface_hub
+git+https://github.com/huggingface/huggingface_hub
+# enable faster download speed in hfh
+hf_transfer
 #diffusers
 git+https://github.com/huggingface/diffusers.git
 #transformers