ci(workflows) add GitHub Actions workflow for preview builds #8444

Job	Run time
ensure-wasm	1m 41s
build	3m 31s
clippy	2m 54s
cairofmt	7s
docs	2m 6s
dojo-world-bindings-check	4m 17s
fmt	1m 8s
dojo-core-test	3m 6s
ensure-docker	9s
dojo-spawn-and-move-example-test	2m 8s
test-hurl	2m 25s
ensure-windows	10m 15s
test	12m 42s
	46m 29s

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