Feat: internal recording / overdubbing

crates/forth/src/words/compile.rs

@@ -113,6 +113,10 @@ pub(super) fn simple_op(name: &str) -> Option<Op> {
         "mstart" => Op::MidiStart,
         "mstop" => Op::MidiStop,
         "mcont" => Op::MidiContinue,
+        "rec" => Op::Rec,
+        "overdub" | "dub" => Op::Overdub,
+        "orec" => Op::Orec,
+        "odub" => Op::Odub,
         "forget" => Op::Forget,
         "index" => Op::Index(None),
         "key!" => Op::SetKey,