feat(github): Create issue templates

[sschuberth]

Resolves #6540.

[sschuberth]

See here for how it looks like.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.70%. Comparing base (168394b) to head (8f4af03).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #8582   +/-   ##
=========================================
  Coverage     67.70%   67.70%           
  Complexity     1007     1007           
=========================================
  Files           246      246           
  Lines          7924     7924           
  Branches        883      883           
=========================================
  Hits           5365     5365           
  Misses         2176     2176           
  Partials        383      383           

Flag	Coverage Δ
funTest-docker	66.49% <ø> (ø)
funTest-non-docker	34.71% <ø> (ø)
test	37.55% <ø> (ø)

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