Stepping down as a maintainer #714

Effective immediately I am stepping down as a maintainer of SolveSpace. This doesn't mean that I will stop contributing to it completely, but it does mean that I will no longer be responsible for the project for the time being. As I'm sure everyone already noticed, I have not been able to complete any significant amount of work for quite a while.

To clarify things a bit, I am doing this for two reasons:

1. Maintaining a relatively popular OSS project with a legacy codebase is not an easy or straightforward task. When combined with my other work and OSS responsibilities as well as a recent series of unfortunate events in my life, this results in an enormous amount of stress and a major impact on my mental health. Regardless of my desire to continue I lack the capability to do so.
2. Although the vast majority of the community that formed around SolveSpace has been excellent to work together with, a few people behave in a way that is unconstructive and directly leads to maintainer burnout. I have not encountered this level of entitlement and persistence when working on any other OSS, of which I maintain plenty, and I do not wish to encounter it ever again.

After this, I believe the project will still be in good hands. For example, @phkahler has been able to fix several longstanding issues I could not meaningfully approach. I wish the project and its other maintainers only the best and I hope I'll be able to contribute to it again at some point in the future.