wasm: one demo page with the whole pipeline (#157) #540

Job	Run time
test (stable)	2m 24s
wasm32 (declarative converters)	57s
fmt · clippy (pinned)	32s
check (coreml, macos-latest)	39s
msrv (1.85 core · 1.88 workspace)	39s
check (cuda, ubuntu-latest)	38s
check (cuda,tensorrt, ubuntu-latest)	37s
check (directml, windows-latest)	1m 43s
release & publish	0s
	8m 9s

Provide feedback