phase: 20.49 COMPLETE; 20.50 Flow+String minimal reps; 20.51 selfhost v0/v1 minimal (Option A/B); hv1-inline binop/unop/copy; docs + run_all + CURRENT_TASK -> 21.0

apps/tests/macro/exception/postfix_catch.hako

@@ -0,0 +1,9 @@
+// Phase 1 sugar: postfix_catch(expr, "Error", fn(e){ body })
+function do_work(args) {
+  return 0
+}
+
+function main(args) {
+  postfix_catch(do_work(args), "Error", fn(e){ print(e) })
+}
+