Add screenshot for take screenshot of page.

[k1LoW]

desc: Take a screenshot
runners:
  cc: chrome://new
steps:
  -
    cc:
      actions:
        - navigate: https://go.dev/
        - screenshot
  -
    dump:
      expr: previous.png
      out: ss.png

Screenshot Result

[github-actions]

Code Metrics Report

	main (8243b88)	#267 (80c358f)	+/-
Coverage	77.4%	77.3%	-0.1%
Code to Test Ratio	1:0.7	1:0.7	-0.0

Details

  |                    | main (8243b88) | #267 (80c358f) |  +/-  |
  |--------------------|----------------|----------------|-------|
- | Coverage           |          77.4% |          77.3% | -0.1% |
  |   Files            |             31 |             31 |     0 |
  |   Lines            |           3264 |           3270 |    +6 |
  |   Covered          |           2527 |           2527 |     0 |
- | Code to Test Ratio |          1:0.7 |          1:0.7 |  -0.0 |
  |   Code             |           7210 |           7228 |   +18 |
  |   Test             |           4965 |           4965 |     0 |

Code coverage of files in pull request scope (73.1% → 69.1%)

Files	Coverage	+/-
cdp.go	76.0%	-5.4%
cdpfn.go	54.3%	-1.6%

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Reported by octocov