Release v0.1.2 - LaunchAgent plist for media key support

- Add mpdcontrol.agent.plist with Aqua session configuration
- Fixes media key handling when running as service
- Ensures proper GUI session access for system integration

v0.1.1

Release v0.1.1 - Album art caching improvements and Swift concurrency…

v0.1

docs: update README and add Nix flake with installable package

- Update README to reflect transformation from menu bar app to CLI tool
- Document current command-line interface and options
- Add comprehensive album art management documentation
- Create Nix flake with development shell and app definitions
- Add installable package for Darwin systems (nix profile install)
- Include links to original mac-mpd-control and mpd-menubar projects
- Provide three nix apps: default (release), test, and dev builds