New problems

[ImogenBits]

Adjusts the pairsum and biclique problem to work with the new Problem classes. Note that I didn't modify the docs for the biclique problem so they now are massively inaccurate.

[Benezivas]

Could you please demonstrate how to adapt the new module structure regarding the tests? We will be able to throw most of the original parser tests away, as it makes sense to write generic tests for specific ProblemModels, such as DirectedGraph.

It would be nice (and sufficient) if you could adapt a few of the old tests for the verifier of the biclique problem, I should then be able to adapt the remaining test cases.

[ImogenBits]

all problems are updated now. Note that they use features from the open PRs in Algobattle since they all seem pretty straightforward, but I'm happy to change them and this repo if you want

[Benezivas]

Thank you, the only thing left to do is to update the CI workflow, then I would merge this into the develop branch until version 4.0.0 of algobattle has been released.

[ImogenBits]

Updated them, you need to manually approve them to run

[Benezivas]

Thank you, I have also adjusted workflows to be manually triggered only for new Accounts.