fix(modify): register TORIENT in the autocomplete command registry

TORIENT dispatched on a literal match but had no CommandRegistration entry,
so it never surfaced in command-line autocomplete. Add the inventory submit
like the other interactive commands.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

src/modules/draw/modify/torient.rs

@@ -185,3 +185,6 @@ impl CadCommand for TorientCommand {
         matches!(self.step, Step::AngleOrFirstPoint)
     }
 }
+
+// ── Autocomplete registry ─────────────────────────────────
+inventory::submit!(crate::command::CommandRegistration { names: &["TORIENT"] });