feat: PC/帧寻址改三维 [d]/[i,j]，if/while 摊成函数内 goto/br，调用帧扁平编号（#116） - #222

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/