arch refactor + backend ir start

src/parser/nodes/asm/mod.rs

@@ -1,5 +1,5 @@
 use crate::{
-    backend::arch::x86_64::Asm,
+    arch::x86_64::Asm,
     parser::{Node, cursor::Token},
 };
 

src/parser/nodes/asm/x86_64.rs

@@ -1,5 +1,5 @@
 use crate::{
-    backend::arch::x86_64::*,
+    arch::x86_64::*,
     io::{CompilerMsg, Span},
     parser::{
         Node,