Add report for issues created/updated/closed

[stoe]

Adds reports for:

• Issues to show how many GitHub issues were created, updated, or closed.
• Comments to show how many comments ware created for issues, pull requests, and commits.

co-authored-by: @jl74

[codecov-commenter]

Codecov Report

Merging #229 (2793c62) into master (d39dd97) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #229   +/-   ##
=======================================
  Coverage   28.37%   28.37%           
=======================================
  Files           1        1           
  Lines         652      652           
=======================================
  Hits          185      185           
  Misses        467      467           

Flag	Coverage Δ
docs	28.37% <ø> (ø)

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[stoe]

@larsxschneider @pluehne would appreciate your review.