Spring clang-tidying #1486
Description
Motivation / Current Behaviour
Since the codebase is somewhat old, there are several recommendations by clang-tidy to correct, clean-up, or modernize our code.
Enhancement description
Use recommendations as suggested by clang-tidy. These include mostly concepts and a more active use of std::move/forward.
Fix some naming, e.g. for include guards.
Remove unused code, if alternatives exist (e.g. from stdlib).
Additional context
No response
Checklist
- Attached labels, especially loc:: or model:: labels.
- Linked to project