Structs can now pass into and be returned from functions + Easy struct reassignment

[DerelictDrone]

Solves part of #4, as this PR doesn't touch array access

Partially adds compiler support for what I'm calling "large variables" for the moment, you can explicit assign a large variable of the same size to another large variable to copy all of its parameters to the left hand, as well, putting large variables as parameters for a function now pushes x number of bytes to the stack

Functions that return large variables will return a pointer to the variable, and assignment to another large variable generates a constant number of mov and inc instructions to fill the large variable on the left hand

Currently "large variables" only encompass structs, but hopefully I've left things flexible enough for future expansion (not that I really know what else to add past this)

See image for working code using struct functions and struct var reassignment w/ outputs

[DerelictDrone]

Going to work on making the default vectors capable of using these features as well if I can, but that'll be a different PR that's partially dependent on this one