[Feature] Prepare for planka v2

[JustSamuel]

What would you like?

With the new v2 coming, we should prepare a v2 branch that uses the new spec.

https://gist.github.com/meltyshev/a0bc611431a2cb3ebe962b7f80837661

Why is this needed?

No response

Other information

No response

[Gijsdeman]

For future reference: plankanban/planka#627 (comment).

Currently, this package tries to make the Planka v1 api more accessible, as the way it is provides/documented is lacking. However, if Planka v2 provides a decent openapi specification, the usefulness of this package becomes questionable. At that point, people could just generate the clients themselves.

However, for maintainability (purely on GEWIS side, at least), it might be nice to at least contain such a client in a separate repository such that it needs not to be generated for every repository that ever has a need to use the Planka v2 API.

For now, I suggest using the provided specs to generate a new client using the hey-api generator, as we have been doing for other projects, and put it on a separate v2 branch. This should suffice for now. In the future, we could fetch these specs automatically every week, and update it with possible package updates.