It's been taken down as it is affected by a severe security bug. It'll be back up once v0.2 releases. ETA: March 2025
Don't know, but some assistance in the code/3d department would go a long way.
It's been disabled until the next update is released.
That's planned, but a fair ways away.
I don't know; things aren't going smoothly enough to have any decent estimate. Ideally as many as possible.