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_vm_simple_loop.hako

@@ -0,0 +1,12 @@
+// 超シンプルなVMループテスト
+local i = 1
+print("Before loop: i = " + i)
+
+// 3回だけループ
+loop(i <= 3) {
+    print("In loop: i = " + i)
+    i = i + 1
+    print("After increment: i = " + i)
+}
+
+print("After loop: i = " + i)