fix: remove gradio from requirements (HF pins 4.0.0), use Gradio 4.x API

fix: force new container build with ZeroGPU support

updated app.py

fix: ZeroGPU spaces decorator + force rebuild

fix: add ZeroGPU spaces decorator

fix: upgrade Gradio to 5.23.0

fix: use valid HF emoji

init

initial commit

Duplicate from gradio-templates/text-to-image-gradio-template