Add stat subcommand

[nao1215]

No description provided.

[github-actions]

Code Metrics Report

	main (1e4b5b8)	#4 (50f8b78)	+/-
Coverage	95.7%	93.1%	-2.6%
Test Execution Time	23s	25s	+2s

Details

  |                     | main (1e4b5b8) | #4 (50f8b78) |  +/-  |
  |---------------------|----------------|--------------|-------|
- | Coverage            |          95.7% |        93.1% | -2.6% |
  |   Files             |              3 |            3 |     0 |
  |   Lines             |             70 |           87 |   +17 |
+ |   Covered           |             67 |           81 |   +14 |
- | Test Execution Time |            23s |          25s |   +2s |

Code coverage of files in pull request scope (95.7% → 93.0%)

Files	Coverage	+/-
config/config.go	80.0%	-20.0%
infrastructure/github/github.go	93.8%	-1.8%

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Reported by octocov