Restructured structs to save on memory

[PBnJK]

In Go, structs are stored in memory "as-is", that is, in the order that they are written. Due to padding, this ends up leaving a bit of memory unused. It is possible (and pretty easy) to re-organize structs so as to optimize them for memory usage.

This is a pretty small PR that just optimizes some of the structs. It may be undesirable for aesthetic reasons, but in my opinion it's a pretty painless improvement.

Here is the data, if you're interested (obtained via the go lsp):

Struct	Old size (bytes	New size (bytes)
Token	32	16
DebuggerToken	72	48
ResolvedToken	64	40
Instruction	40	32
Breakpoint	24	16

[gboncoffee]

Great catch. Thanks for the contribution!