增加G1零进给错误fixture验证

结论：新增 g1_zero_feed 负向 fixture，固定 G1 在 feed rate 为 0 时返回 INTERP_ERROR=5、输出 LinuxCNC 对应错误文本、不产生 STRAIGHT_FEED，且失败前不更新当前位置和 #5420/#5421/#5422。检查：git diff --check 通过；wasm-port/tests/native/verify_native_probes.sh 通过。

wasm-port/runtime/core/linuxcnc_wrap/linuxcnc_interp_minimal_runtime.cpp

@@ -10,6 +10,7 @@
 #include "emc/rs274ngc/rs274ngc_interp.hh"
 #undef private
 
+#include "emc/rs274ngc/rs274ngc_return.hh"
 #include "canon_event_sink.hh"
 
 PythonPlugin *python_plugin = nullptr;
@@ -381,6 +382,13 @@ int Interp::convert_g(block_pointer block, setup_pointer settings)
         SET_FEED_RATE(block->f_number);
     }
 
+    if ((block->motion_to_be == G_1) &&
+        (settings->feed_mode == FEED_MODE::UNITS_PER_MINUTE) &&
+        (settings->feed_rate == 0.0)) {
+        setError("%s", NCE_CANNOT_DO_G1_WITH_ZERO_FEED_RATE);
+        return INTERP_ERROR;
+    }
+
     const bool incremental = settings->distance_mode == DISTANCE_MODE::INCREMENTAL;
     if (block->x_flag) {
         settings->current_x = incremental ? settings->current_x + block->x_number