ft(interpreter): impl basic call

src/operands.rs

@@ -110,6 +110,16 @@ impl From<Word> for ImmediateOperand {
     }
 }
 
+impl From<usize> for ImmediateOperand {
+    fn from(value: usize) -> Self {
+        if value > Word::MAX as usize {
+            panic!("Cannot convert usize to ImmediateOperand::Word")
+        } else {
+            ImmediateOperand::Word(value as Word)
+        }
+    }
+}
+
 impl Into<Word> for ImmediateOperand {
     fn into(self) -> u16 {
         match self {