Support for adding code metrics report to GitHub Actions Job Summaries

[k1LoW]

https://github.blog/2022-05-09-supercharging-github-actions-with-job-summaries/

[github-actions]

Code Metrics Report

	main (f3d1a15)	#168 (df7557c)	+/-
Coverage	66.4%	65.9%	-0.5%
Code to Test Ratio	1:0.5	1:0.5	-0.0
Test Execution Time	43s	34s	-9s

Details

  |                     | main (f3d1a15) | #168 (df7557c) |  +/-  |
  |---------------------|----------------|----------------|-------|
- | Coverage            |          66.4% |          65.9% | -0.5% |
  |   Files             |             29 |             29 |     0 |
  |   Lines             |           2393 |           2432 |   +39 |
+ |   Covered           |           1590 |           1603 |   +13 |
- | Code to Test Ratio  |          1:0.5 |          1:0.5 |  -0.0 |
  |   Code              |           6169 |           6303 |  +134 |
+ |   Test              |           2833 |           2838 |    +5 |
+ | Test Execution Time |            43s |            34s |   -9s |

Code coverage of files in pull request scope (68.1% → 66.4%)

Files	Coverage	+/-
config/config.go	57.3%	+0.6%
config/ready.go	69.5%	-14.8%
config/yaml.go	78.2%	+0.4%
report/diff_report.go	67.0%	+0.3%
report/report.go	67.4%	+0.1%

---

Reported by octocov