Added arena_alloc and decided to change the arena pointer type from void *
to uint8_t * because i need to support 1 byte pointer arithmetic, thought of
using uintptr_t but not sure, the support seems really weird from what i read
online so i'm sticking with good old uint8_t * (wich i know works).
Realized that if i want to use malloc and free i either have to make some
sort of interface that lets you use a custom allocator and deallocator
or just use them by default. Maybe later it would be cool to change it
to that but for now is out of the scope of my project.
# Tipos:
# feat, fix, refactor, docs, style, test, chore
