Add s3hub mb subcommand

[nao1215]

No description provided.

[github-actions]

HOTTEST report

PASS	FAIL	SKIP	TOTAL	DURATION
69	0	2	71	16.27170777s

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Reported by hottest

[github-actions]

Code Metrics Report

	main (b95d8e0)	#8 (bb17b78)	+/-
Coverage	28.2%	23.6%	-4.6%
Test Execution Time	5s	24s	+19s

Details

  |                     | main (b95d8e0) | #8 (bb17b78) |  +/-  |
  |---------------------|----------------|--------------|-------|
- | Coverage            |          28.2% |        23.6% | -4.6% |
  |   Files             |             17 |           17 |     0 |
  |   Lines             |            301 |          347 |   +46 |
- |   Covered           |             85 |           82 |    -3 |
- | Test Execution Time |             5s |          24s |  +19s |

Code coverage of files in pull request scope (22.0% → 8.3%)

Files	Coverage	+/-
app/domain/model/aws.go	28.0%	-8.8%
app/external/s3.go	0.0%	0.0%
app/interactor/s3.go	0.0%	0.0%
cmd/subcmd/s3hub/mb.go	0.0%	-100.0%
cmd/subcmd/s3hub/root.go	6.7%	0.0%

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Reported by octocov