feat(examples): define metadata & royalty info for GRC721 realm #5369

Job	Run time
build (1.21.x, GOARCH=amd64 GOOS=linux, gno)	2m 5s
build (1.21.x, GOARCH=wasm GOOS=js, gno)	30s
build (1.22.x, GOARCH=amd64 GOOS=linux, gno)	22s
build (1.22.x, GOARCH=wasm GOOS=js, gno)	30s
test (1.21.x, _test.cmd)	1m 38s
test (1.21.x, _test.pkg)	1m 10s
test (1.21.x, _test.gnolang.native)	36s
test (1.21.x, _test.gnolang.stdlibs)	2m 34s
test (1.21.x, _test.gnolang.realm)	35s
test (1.21.x, _test.gnolang.pkg0)	2m 0s
test (1.21.x, _test.gnolang.pkg1)	6m 31s
test (1.21.x, _test.gnolang.pkg2)	4m 13s
test (1.21.x, _test.gnolang.other)	25s
test (1.22.x, _test.cmd)	1m 20s
test (1.22.x, _test.pkg)	43s
test (1.22.x, _test.gnolang.native)	33s
test (1.22.x, _test.gnolang.stdlibs)	47s
test (1.22.x, _test.gnolang.realm)	36s
test (1.22.x, _test.gnolang.pkg0)	2m 0s
test (1.22.x, _test.gnolang.pkg1)	6m 13s
test (1.22.x, _test.gnolang.pkg2)	4m 35s
test (1.22.x, _test.gnolang.other)	33s
upload-coverage	14s
	40m 43s

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