Resolve "Use aggregate initialization instead of constructors"

Closes #119

See merge request mechanics-and-materials/ae108!108

Start using C++20

See merge request mechanics-and-materials/ae108!140

clang-tidy: Apply hicpp-use-auto,hicpp-use-emplace,misc-const-correctness,modernize-type-traits,modernize-use-std-numbers,performance-avoid-endl,readability-redundant-casting

Clang tidy

See merge request mechanics-and-materials/ae108!138