feat(standalone): emit FP32/rv32imf platform kernels for Stage-2 prob… - #98

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, actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/