Add remove subcommand

[nao1215]

No description provided.

[github-actions]

HOTTEST report

PASS	FAIL	SKIP	TOTAL	DURATION
100	0	4	104	1.345179573s

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Reported by hottest

[github-actions]

Code Metrics Report

	main (89110b0)	#10 (c6e78d6)	+/-
Coverage	19.6%	16.9%	-2.7%
Test Execution Time	2s	3s	+1s

Details

  |                     | main (89110b0) | #10 (c6e78d6) |  +/-  |
  |---------------------|----------------|---------------|-------|
- | Coverage            |          19.6% |         16.9% | -2.7% |
  |   Files             |             19 |            20 |    +1 |
  |   Lines             |            403 |           599 |  +196 |
+ |   Covered           |             79 |           101 |   +22 |
- | Test Execution Time |             2s |            3s |   +1s |

Code coverage of files in pull request scope (16.9% → 14.7%)

Files	Coverage	+/-
app/di/wire_gen.go	0.0%	0.0%
app/domain/model/s3.go	80.3%	-13.3%
app/external/s3.go	0.0%	0.0%
app/external/s3_retryer.go	0.0%	0.0%
app/interactor/s3.go	0.0%	0.0%
cmd/subcmd/common.go	80.0%	+80.0%
cmd/subcmd/s3hub/ls.go	0.0%	0.0%
cmd/subcmd/s3hub/mb.go	0.0%	0.0%
cmd/subcmd/s3hub/rm.go	0.0%	-100.0%
ui/s3hub.go	0.0%	0.0%
utils/errfmt/errfmt.go	100.0%	0.0%

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Reported by octocov