chore(deps): upgrade major versions (pinia 4, jsdom 30, markdown-it 15, oui-data 2, tiptap 3.30) - #40

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac, docker/build-push-action@v6, docker/login-action@v3, docker/setup-buildx-action@v3, docker/setup-qemu-action@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/