feat(cpu): install IDT with exception and syscall gate handling

include/idt.h

@@ -0,0 +1,6 @@
+#ifndef FROSTBYTE_IDT_H
+#define FROSTBYTE_IDT_H
+
+void idtInit(void);
+
+#endif

include/isr.h

@@ -0,0 +1,16 @@
+#ifndef FROSTBYTE_ISR_H
+#define FROSTBYTE_ISR_H
+
+#include "types.h"
+
+typedef struct Registers {
+    uint64 r15, r14, r13, r12, r11, r10, r9, r8;
+    uint64 rbp, rdi, rsi, rdx, rcx, rbx, rax;
+    uint64 intNo, errCode;
+    uint64 rip, cs, rflags, rsp, ss;
+} __attribute__((packed)) Registers;
+
+uint64 isrDispatch(Registers* regs);
+uint64 syscallDispatch(Registers* regs);
+
+#endif