feat(examples): define metadata & royalty info for GRC721 realm #4433

Job	Run time
build (1.21.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	10s
test (1.21.x, _test.flappy)	33s
build (1.21.x, amd64, linux, ./pkg/amino/cmd/goscan)	11s
test (1.21.x, _test.pkg.amino)	1m 32s
build (1.21.x, amd64, linux, ./pkg/autofile/cmd)	22s
test (1.21.x, _test.pkg.bft)	21m 17s
build (1.21.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	20s
test (1.21.x, _test.pkg.others)	1m 28s
build (1.22.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	13s
build (1.22.x, amd64, linux, ./pkg/amino/cmd/goscan)	16s
build (1.22.x, amd64, linux, ./pkg/autofile/cmd)	10s
test (1.22.x, _test.flappy)	29s
build (1.22.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	15s
test (1.22.x, _test.pkg.amino)	2m 4s
test (1.22.x, _test.pkg.bft)	2m 16s
test (1.22.x, _test.pkg.others)	1m 19s
upload-coverage	0s
	32m 55s

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