Add seti and int operators

bin/example.wasm

@@ -4,10 +4,32 @@ muli $2 %B %C;
 divi $2 %C %D;
 
 # Set A to zero
-addi $1 $0 %A;
+seti %A $0;
 
-# Increment A until it is greater than 9
+# Loop from 0 to 10
 loop:
 addi $1 %A %A;
+
+# Print the current value
+int $1;
+seti %B %A;
+seti %A $10; # new line
+int $0;
+seti %A %B;
+
 lti %A $10;
-jmp loop;
+jmp loop;
+
+# Hello world
+seti %A $72;  # H
+int $0;
+seti %A $101; # e
+int $0;
+seti %A $108; # l
+int $0;
+int $0;
+seti %A $111; # o
+int $0;
+
+seti %A $10; # newline
+int $0;