feat: add dark mode support - #222

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Gradle 8.13 is out of date: consider updating to the latest Gradle version. See https://docs.gradle.org/current/userguide/feature_lifecycle.html#eol_support