conlang: Add Tuple-Struct Patterns

- Patterns are no longer parsed with the highest precedence
- Function calls with just a path and a tuple of args can now be transformed into a Pattern

compiler/cl-ast/src/ast_visitor/visit.rs

@@ -234,6 +234,10 @@ pub trait Visit<'a>: Sized {
                     });
                 });
             }
+            Pattern::TupleStruct(path, items) => {
+                self.visit_path(path);
+                items.iter().for_each(|bind| self.visit_pattern(bind));
+            }
         }
     }