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_plugin_debug.hako

@@ -0,0 +1,11 @@
+local c = new CounterBox()
+c.inc()
+local val = c.get()
+print("Before print:")
+print(val)
+print("After print")
+
+// 比較用
+local x = 42
+print("Normal int:")
+print(x)