继续完成 web-rtcp-5axis-sim-plan

结论：完成 LinuxCNC kinematics WASM ABI 覆盖，并将 web-rtcp-5axis-sim-plan 的 RTCP frame/boundary adapter 接到 xyzac-trt kinematics SDK；Node、build、browser smoke 验证通过。

wasm-port/runtime/sdk/src/index.js

@@ -1,5 +1,10 @@
 export { createLinuxCncIniSdk } from "./linuxcnc-ini.js";
 export { createLinuxCncInterpSdk } from "./linuxcnc-interp.js";
+export {
+  createLinuxCncKinematicsSdk,
+  linuxCncKinematicsWasmFile,
+  supportedLinuxCncKinematicsModules,
+} from "./linuxcnc-kinematics.js";
 export {
   VIRTUAL_HAL_AXES,
   VIRTUAL_HAL_AXISUI_PINS,