Windows sandboxing

[pandaninjas]

to do:

• [x] c++ sandbox library glued by jni
• [x] implementation of sandbox from java side
• [x] move the jni'd classes into the windows_sandbox subproject
• [ ] documentation
• [ ] rewrite it in rust (maybe if i feel like it)
• [x] make ipc work (required for nosession)
• [ ] compatibility with other mods