Add chat template kwargs to tokenizer API - #2421

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830, actions/cache/save@0057852bfaa89a56745cba8c7296529d2fc39830, microsoft/onnxruntime-github-actions/setup-build-tools@47a55233e7a9e40e8ade1a71d1b6141be5044924. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.