feat(docs): generate gif for better doc integration #57

Job	Run time
build (1.21.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	8s
build (1.21.x, amd64, linux, ./pkg/amino/cmd/goscan)	11s
build (1.21.x, amd64, linux, ./pkg/autofile/cmd)	28s
build (1.21.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	15s
build (1.22.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	8s
test (1.21.x, _test.flappy)	31s
test (1.21.x, _test.pkg.amino)	1m 33s
build (1.22.x, amd64, linux, ./pkg/amino/cmd/goscan)	13s
test (1.21.x, _test.pkg.bft)	2m 24s
build (1.22.x, amd64, linux, ./pkg/autofile/cmd)	21s
test (1.21.x, _test.pkg.others)	1m 33s
build (1.22.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	13s
test (1.22.x, _test.flappy)	38s
test (1.22.x, _test.pkg.amino)	1m 37s
test (1.22.x, _test.pkg.bft)	21m 14s
test (1.22.x, _test.pkg.others)	1m 20s
upload-coverage	0s
	32m 47s

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