Add gas report docs

[ddoktorski]

Closes #3660

[ddoktorski]

This change is part of the following stack:

• Store execution summary in trace data #3794
  • Keep resources of failed calls in trace #3795
    • Add gas component to debugging trace #3796
      • Move trace data code to separate file #3798
        • Change default tracked resource to sierra gas #3801
          • Rename fuzzing gas info #3823
            • Display fuzzing output without fractional parts #3840
              • Add gas report logic #3841
                • Create ContractsDataStore only once #3856
                  • Display gas report table #3842
                  • Display gas report table for fork contracts #3876
                  • Add gas report docs #3879 ◀

_{Change managed by git-spice.}

[franciszekjob]

LGTM