feat: seeded challenges and many other improvements!

BREAKING for server->widget. if you're using an old version of the widget with the new server, it will not work. old server versions with the new widget will work fine.

solver: add seeded challenges support

feat: seeded challenges and many other improvements!

BREAKING for server->widget. if you're using an old version of the widget with the new server, it will not work. old server versions with the new widget will work fine.

widget: add legacy notice

fix tiagozip#60

feat: add ::parts

standalone: bump version

feat: fixes bug in standalone

feat: standalone v2!

widget: move to latest wasm version