2026-04-20+2026-04-24 (3UE*2): C++ Exercise#

Re-implement the PWM exercise in C++. The nonsensical Point example from 2026-04-20 can be taken as guidance.

Attention: for this work, please

Create a branch in you local copy (e.g. pwm-cpp)
Implement the feature on that branch. Check that you are on the correct branch!!
```
$ git branch
pwm-cpp
```
Push that branch to your fork on Codeberg when done
Send a pull request from that branch