feat(docs): generate gif for better doc integration #42

Job	Run time
build (1.21.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	13s
test (1.21.x, _test.flappy)	33s
build (1.21.x, amd64, linux, ./pkg/amino/cmd/goscan)	10s
test (1.21.x, _test.pkg.amino)	1m 28s
test (1.21.x, _test.pkg.bft)	1m 26s
build (1.21.x, amd64, linux, ./pkg/autofile/cmd)	13s
test (1.21.x, _test.pkg.others)	1m 21s
test (1.22.x, _test.flappy)	37s
build (1.21.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	12s
test (1.22.x, _test.pkg.amino)	1m 18s
build (1.22.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	9s
test (1.22.x, _test.pkg.bft)	1m 12s
build (1.22.x, amd64, linux, ./pkg/amino/cmd/goscan)	16s
test (1.22.x, _test.pkg.others)	1m 11s
build (1.22.x, amd64, linux, ./pkg/autofile/cmd)	13s
build (1.22.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	13s
upload-coverage	1s
	10m 46s

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