[CLEANUP] Uses of `valueToString` and such use default malloc and free

[Jason2605]

Is there an existing issue for this?

• [X] I have searched the existing issues

Is your feature request related to a problem?

Uses of valueToString and such use default malloc and free, it would be much better if it was handled via the macros provided within https://github.com/dictu-lang/Dictu/blob/develop/src/vm/memory.h

This means if we ever need to swap allocator at some point in the future, it's all handled in a single place. It also means that the GC isn't running when it potentially should be as this is happening outside the realm of the memory watermark.

Describe the solution you'd like

No uses of malloc / realloc / free within the project, all handled through the macros.

Describe alternatives you've considered

No response

Additional context

No response