Support installation via Homebrew

Is your feature request related to a problem? Please describe.

Currently, macOS users need to manually download the .dmg file from the GitHub Releases page and drag it to the Applications folder. The main pain point is that updating the application is inconvenient—users have to check for new versions, re-download, and overwrite the old version manually.

Describe the solution you'd like

I would like to be able to install and update Blinko via Homebrew Cask. This would allow users to:

1. Install with: brew install --cask blinko

2. Update with: brew upgrade --cask blinko (or just brew upgrade)

This can be achieved by adding a Cask definition to the official Homebrew repository or by maintaining a private Tap. Since Blinko already provides .dmg builds, creating a Cask is straightforward.

Describe alternatives you've considered

I've been using the manual .dmg installation, but it is time-consuming to stay up-to-date with the latest features and bug fixes.

Additional context

Supporting Homebrew Cask is a standard practice for modern macOS applications. It simplifies the distribution process and ensures that the user base is always running the latest version with minimal effort.