Create question template

[coilysiren]

Motivation

I'm really loving the templates, and think it would be helpful to encourage more issue like this one #1009 ✨

[codecov]

Codecov Report

Merging #1019 into master will increase coverage by 0.09%.
The diff coverage is 58.33%.

@@            Coverage Diff            @@
##           master   #1019      +/-   ##
=========================================
+ Coverage    72.5%   72.6%   +0.09%     
=========================================
  Files          33      33              
  Lines        2495    2482      -13     
=========================================
- Hits         1809    1802       -7     
+ Misses        575     569       -6     
  Partials      111     111

Impacted Files	Coverage Δ
altsrc/map_input_source.go	52.85% <ø> (ø)	⬆️
context.go	95.45% <ø> (ø)	⬆️
app.go	78.71% <ø> (+1.54%)	⬆️
altsrc/flag_generated.go	64.28% <ø> (ø)	⬆️
altsrc/json_source_context.go	19.83% <0%> (ø)	⬆️
flag.go	86.22% <100%> (-0.06%)	⬇️
flag_int.go	70% <100%> (ø)	⬆️
flag_string.go	88.88% <100%> (ø)	⬆️
flag_duration.go	70% <100%> (ø)	⬆️
flag_int_slice.go	72.46% <100%> (ø)	⬆️
... and 11 more

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[coilysiren]

here's another case where someone would have picked the question template 🙂 #1034