Add ZeroGPU backend so any HF model runs on Space GPU (default XHToken/Spark-X2.5-4B)

Restore Gradio SDK metadata in README

Add Dockerfile with non-root setup and remove sdk metadata

Use Gradio 6.19.0 in requirements and sdk_version

Update Gradio to >=5.0 and sdk_version metadata

Fix HF Space colorTo value

Add HF Space README header

Initial commit: Algorithm Finder Gradio app