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

local_tests/test_simple_string.hako

@@ -0,0 +1,7 @@
+// Test simple string creation
+static box Main {
+    main() {
+        local message = "Hello"
+        return message
+    }
+}