推进LinuxCNC WASM最小解释器验证

结论：新增独立 wasm-port 工作区，修复 native probes include 路径，最小解释器 harness 已可验证 G0 直线快速、G1 进给和 SET_FEED_RATE canonical event。检查：git diff --check 通过；wasm-port/tests/native/verify_native_probes.sh 通过。

wasm-port/runtime/core/include/canon_event_sink.hh

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <string>
+#include <vector>
+
+namespace standalone {
+
+void reset_canon_events();
+void push_canon_event(const std::string &event);
+const std::vector<std::string> &canon_events();
+
+}  // namespace standalone