ft: introduce modrm macro for leaner matching

All instructions which use a modrm instruction
for memory reads from or into a register can
make use of this macro

src/main.rs

@@ -2,6 +2,7 @@ use clap::{Parser, Subcommand};
 
 mod aout;
 mod disasm;
+mod disasm_macros;
 mod instructions;
 
 #[derive(Subcommand, Debug)]