feat: add ModelDefinition to Dojo Model #8285

Job	Run time
cairofmt	5s
build	3m 19s
docs	2m 22s
clippy	2m 34s
dojo-world-bindings-check	4m 12s
ensure-wasm	1m 54s
fmt	1m 37s
dojo-spawn-and-move-example-test	2m 20s
dojo-core-test	3m 37s
test-hurl	2m 30s
ensure-docker	8s
ensure-windows	11m 47s
test	5m 18s
	41m 43s

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