remove preset management from the shared demo

fix: point the xet cache at /tmp so downloads can write

sync: update inference code to match GitHub main

Update README.md

fix: drop examples referencing missing wavs in cases.jsonl

Set up IndexTTS 2.5 Gradio demo (ZeroGPU) (part 2)

Set up IndexTTS 2.5 Gradio demo (ZeroGPU)

Delete index.html with huggingface_hub

initial commit

Duplicate from gradio/gradio-lite-template