Software render

Added screenshot functionality and software render to function with new autograder.

Ties together with: https://gitlab.stud.idi.ntnu.no/tdt4102/grading/autograder/-/merge_requests/10

requested review from @bartiver

assigned to @roryf

Hmm.. I'm not sure this should be in this repository, since the resources repository is facing publicly and is used for all students. I think it should be part of the autograder repository, or its own separate thing.

Create a private fork of animationwindow then?

Then again, if we're doing automatic grading next year, we may need this for some of the tasks :/

added 1 commit

• d6ef6031 - improved function names, and changed back to C++20

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added 1 commit

• 0074e862 - More descriptive variable names and proper error handling for software rendering

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