Formatted the code, made the arch code x86_64 only for now, fixed the

serial writer always centering and assuming, added a margin for correct
displaying. Added the IDT and GDT tables, and the TSS so double faults
cant happen. Handled all of these interrupts using functions. Serial
console is now topleft and panic messages are formatted correctly from
there. core PI constant is now used instead of our own.

kernel/src/arch/x86_64/idt.rs

@@ -0,0 +1,23 @@
+use crate::arch::x86_64::{
+    gdt,
+    interrupts::{breakpoint_handler, double_fault_handler},
+};
+use lazy_static::lazy_static;
+use x86_64::structures::idt::InterruptDescriptorTable;
+
+lazy_static! {
+    static ref IDT: InterruptDescriptorTable = {
+        let mut idt = InterruptDescriptorTable::new();
+        idt.breakpoint.set_handler_fn(breakpoint_handler);
+        unsafe {
+            idt.double_fault
+                .set_handler_fn(double_fault_handler)
+                .set_stack_index(gdt::DOUBLE_FAULT_IST_INDEX);
+        }
+        idt
+    };
+}
+
+pub fn init_idt_x86_64() {
+    IDT.load();
+}