feat: index sample command #514

Job	Run time
ci-lint	17s
build-2k	5m 11s
build-debug	4m 30s
build-calibnet	4m 43s
build-forest	4m 36s
build-mainnet	4m 34s
gen-check	10m 35s
gofmt	14s
lint	3m 32s
mod-tidy-check	29s
setup-params	3s
test (test-itest-curio, ./itests/curio_test.go)	7m 1s
test (test-all, `go list ./... \| grep -v curio/itests`)	3m 18s
test (test-itest-harmonyDB, ./itests/harmonydb_test.go)	3m 9s
test (test-itest-alertnow, ./itests/alertnow_test.go)	1m 56s
	54m 8s

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