Began writing Toy_VM, read more

Toy_VM and Toy_Stack are both considered WIP, and neither has any tests
yet.

source/toy_stack.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "toy_common.h"
+#include "toy_value.h"
+
+typedef struct Toy_Stack {
+	Toy_Value* ptr;
+	int capacity;
+	int count;
+} Toy_Stack;
+
+TOY_API void Toy_initStack(Toy_Stack* stack); //null memory
+TOY_API void Toy_preallocateStack(Toy_Stack* stack); //non-null memory, ready to go
+TOY_API void Toy_freeStack(Toy_Stack* stack);
+
+TOY_API void Toy_pushStack(Toy_Stack* stack, Toy_Value value);
+TOY_API Toy_Value Toy_peekStack(Toy_Stack* stack);
+TOY_API Toy_Value Toy_popStack(Toy_Stack* stack);