v0.02 GUI/layout demo

this release contains, among other things:

• memory management, malloc() and free()
• dynamic arrays with nov_array<>, similar to std::vector<>
• some graphics utils, box drawing etc
• a shiny GUI system of containers and panels for graphical layouting. a demo of this runs when you launch the binary with qemu
• random number generation using xoroshiro128+ (was this in the last release? i don't know)

i'll start fully documenting (diagrams and all) this stuff soon.

https://github.com/oculometric/novos/assets/32058792/0d4dee0c-b82b-4709-a05a-0933e0d81dd9
https://github.com/oculometric/novos/assets/32058792/a6f2bfb6-7fda-421d-9dc8-112b775ba4bf