style: Apply SwiftFormat and add code quality toolkit script

[dioKaratzas]

• Auto-format Swift codebase using SwiftFormat to enforce consistent spacing and indentation
• Fix trailing commas, self usage, and import ordering
• Add script_hub.sh as a unified code quality toolkit that: • Automatically detects and installs SwiftFormat/SwiftLint via Homebrew • Provides interactive menu for running formatting/linting tools • Shows color-coded output with detailed error reporting • Streamlines the development workflow with consistent code style

[dimitris-c]

Thanks for the PR.
I wouldn't add the script, since it doesn't add much value, ideally swiftformat / swiftlint should be run as part of Xcode's build phase to ensure correct format before a release is made.

[dioKaratzas]

Hey @dimitris-c , thanks for the review!

I’m totally on board with running SwiftFormat/SwiftLint in the Xcode build phase. Besides the build-phase checks, we can also add a GitHub Actions step that lint-checks every PR.

The small script_hub.sh wrapper is just there to lower the barrier for casual contributors:

• One-liner setup: ./script_hub.sh format installs (via Homebrew, if needed) and runs the formatter/linter in a single command.
• Editor-agnostic: Not everyone opens the package from .xcproject or even Xcode—some use VS Code or work from Linux—so having a CLI entry point keeps the workflow consistent.
• Pre-push safety net: Contributors can format everything locally and be confident the CI will pass before pushing.

Happy to move or rename the script if it feels out of place—the goal is simply to make it easier to keep the codebase consistently formatted while still enforcing the rules in CI.

Let me know what you think! 🙌