feat(theme): adopt LobeHub-inspired documentation styles - #792

buildx failed with: ERROR: failed to build: invalid tag "***/deepservice/docs:style/lobehub-inspired-37757035808-1": invalid reference format

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-node@v4, docker/build-push-action@v6, docker/login-action@v3, docker/setup-buildx-action@v3, pnpm/action-setup@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/