Add wolfBoot target for NXP i.MX95 Cortex-A55, including a stage 1 that replaces U-Boot SPL - #888

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/