Add sound support

What's Changed

• Add macOS to CI by @thiagokokada in #5
• Add notification sound by @thiagokokada in #6
• Add tests by @thiagokokada in #7
• Minor improvements by @thiagokokada in #8
• Linux fixes by @thiagokokada in #9
• Add twenty-twenty-twenty-static to flake.nix by @thiagokokada in #10

Full Changelog: v0.4...v0.5