Refactor common types

Refactor common types

- Make types as `trivial` as possible
- Make types as `constexpr` as possible
- Harmonize all `operator`s
- Harmonize all docs
- Add unit tests for all types (static where possible)

The program was tested solely for our own use cases, which might differ from yours.

Martin Stump martin.stump@mercedes-benz.com on behalf of Mercedes-Benz Tech Innovation GmbH, Provider Information