feat: move allocator and slots into codegen folder

include/codegen/allocator.hpp

@@ -1,6 +1,6 @@
 #pragma once
 #include "prelude/string.hpp"
-#include "ir/slot.hpp"
+#include "codegen/slot.hpp"
 
 #define AVAILABLE_REGISTERS 4
 #define AVAILABLE_STACK_SIZE 4096
@@ -10,6 +10,7 @@ class Allocator
 {
 public:
     virtual ~Allocator() {};
+
 public:
     virtual const Slot &Allocate(SlotAddr addr) = 0;
     virtual const Slot &Resolve(SlotAddr addr) = 0;
@@ -20,6 +21,7 @@ class SlotAllocator : public Allocator<IR::IRSlot>
 public:
     SlotAllocator() = default;
     ~SlotAllocator() = default;
+
 public:
     const IR::IRSlot &Allocate(const StringView &addr) override
     {
@@ -50,10 +52,13 @@ public:
 
         assert(0 && "could not resolve stack offset for specified address");
     }
+
 public:
     View<IR::IRSlot> slots() const { return m_slots.view(); }
+
 public:
     unsigned int GetStackSize() const { return m_offset_counter; }
+
 public:
     int m_regs = 0;
     unsigned int m_offset_counter = 0;