Add Homebrew Cask for Cinny

[Neved4]

Description

Adds a Cask formula to install Cinny using the Homebrew package manager.

Finally fixes #62

After this PR, Cinny can be installed with:

brew tap cinnyapp/cinny-desktop https://github.com/cinnyapp/cinny-desktop
brew install cinny

The Cask formula could be moved into its own separate homebrew-tap repo under the Cinny project. See #62 (comment)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[github-actions]

All contributors have signed the CLA ✍️ ✅
_{Posted by the CLA Assistant Lite bot.}

[Neved4]

I have read the CLA Document and I hereby sign the CLA

[kfiven]

Will the cask be automatically updated or we will have to do it manually? Also will it use the built-in auto update or something else?
If not can we setup something to update the cask file automatically?

[Neved4]

Those are great questions:

• Updating is now manual, it's a good idea to automate it later
• Uses the built-in auto update as per cinny.rb#L15
• We can certainly setup something, like the Homebrew bump formula GitHub Action,
  setting ${{secrets.TOKEN}} and the rest in a .yml.

[kfiven]

Can we please setup auto-update along with this addition as we want to automate as much release workflow we can.

[Neved4]

Sure! Added the GitHub Action, let me know if anything else is needed.

[Neved4]

Note that the public_repo and workflow scopes are required in the custom access token ${{secrets.TOKEN}}

Also, moving the Casks/ into a separate homebrew-tap repo within Cinny's org will make installs simpler:

brew install cinnyapp/tap/cinny

[Neved4]

@kfiven had this running in my own private tap for a while now

So far delivering the last few upgrades with no issues: Neved4/tap/cinny_v4.2.0

Let me know if further help is needed