Need `CodeQuality` issue template

[djeedai]

What problem does this solve or what need does it fill?

Users cannot create issues for code quality, only for bugs and new features. For example #5439 is neither a bug (everything works), nor a feature request (the API would possibly change a bit, but the feature set won't).

What solution would you like?

Add a new GitHub template for code quality.

What alternative(s) have you considered?

Ping @alice-i-cecile for each new code quality Issue to remove the C-Bug tag and add the C-CodeQuality one.

Additional context

Surprisingly, Alice seem to prefer the template approach... ¯\_(ツ)_/¯

[alice-i-cecile]

I am in fact in favor of this!

[harudagondi]

Should #5279 be merged first before tackling this?

[alice-i-cecile]

No need; I'm fine to do them in whatever order.