feat: add exercise for pointer concept

[vaeng]

No description provided.

[siebenschlaefer]

I like the exercise itself. In the JavaScript track it's used to show how objects can be constructed and composed, IMHO a really good exercise for that because it's simple enough for beginners but not trivial.

But here the exercise is used to showcase pointers and dynamic memory allocation. That looks rather forced. Why should the position and size be passed by pointer, why should programWindow allocate memory dynamically? That just makes it more difficult, without (at least to me) clear benefits. I'm missing the motivation for that.
The dynamic memory allocation also adds the problem of ownership. Now the students have to write a destructor (and if they follow the rule of five also at least delete the copy constructor and copy assignment operator.)

I would really like a different exercise for this pointer concept, one where pointers (and maybe dynamic memory allocation) are a better fit.

[vaeng]

@siebenschlaefer
Thanks for all the feedback, you were completely right. This one was hard and it took me quite a while to get back into the exercise game. The windowing java thing was not the right fit for cpp pointers.
I scraped everything and created a completely new exercise, it is more limited in range and probably more direct to help students understand the concepts.

@ahans
You are very welcome to comment 🙌

[vaeng]

I added a task, so students can use the & opertor.

[vaeng]

Hey @ErikSchierboom, do you have time to review this new exercise? I would like to move the syllabus along, but the other two maintainers seem busy.