Fix K/N leaks completely

[dokar3]

We sometimes get crashed tests due to the js object leaking:

com.dokar.quickjs.test.CloseWhileEvaluatingTest.closeWithMultipleEvaluations[macosArm64] FAILED
    Unknown

There were failing tests. See the report at: file:///Users/runner/work/quickjs-kt/quickjs-kt/quickjs/build/reports/tests/macosArm64Test/index.html
30 tests completed, 1 failed
Test running process exited unexpectedly.
Current test: closeWithMultipleEvaluations
Process output:
 Assertion failed: (list_empty(&rt->gc_obj_list)), function JS_FreeRuntime, file quickjs.c, line 2036.

We/AI Agents need to work harder on this.