feat: show expected/received diffs for failed assertions - #202

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/setup-node@3235b876344d2a9aa001b8d1453c930bba69e610, nrwl/nx-set-shas@826660b82addbef3abff5fa871492ebad618c9e1, pnpm/action-setup@a7487c7e89a18df4991f7f222e4898a00d66ddda. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/