Add interactive menu demo and integrate interactive TUI helpers

[joejollands]

Motivation

• Provide a hands-on demo so users can exercise the new interactive TUI primitives (menus, checkboxes, radios) in an obvious, discoverable way.
• Expose a small, composable API that fits existing command traits so both Laravel and Symfony commands can present interactive menus.
• Ship safe terminal helpers and tests to avoid leaving the terminal in an unusable state and to validate low-level key/ANSI behavior.

Description

• Add a new demo command TartInteractiveDemoCommand (php artisan tart:interactive-demo) that walks through a single-select menu, a checkbox multi-select, and a radio selection with a TTY guard and user guidance.
• Register the demo command in TartServiceProvider and add the demo entry to README.md so it is discoverable in the demo list.
• Introduce interactive menu infrastructure: IGC art\Support\n - InteractiveMenu` (selection, checkbox, radio flows and rendering),
  • TerminalMode, TerminalInput, TerminalControl, and KeyPress (raw-mode handling, key parsing, ANSI cursor/control sequences).
• Add the HasInteractiveMenus concern and wire it into both StyledCommand classes so commands gain menu(), checkboxMenu(), and radioMenu() helpers.
• Add unit tests for low-level behavior: tests/Unit/KeyPressTest.php and tests/Unit/TerminalControlTest.php that validate key parsing and ANSI sequences.

Testing

• Unit tests were added: tests/Unit/KeyPressTest.php and tests/Unit/TerminalControlTest.php, but an automated test run was not executed in this environment.
• No CI/test output is available from this rollout, so test pass/fail status is unknown.
• Interactive demo is gated by a TTY check (stream_isatty(STDIN)) and exercises the runtime behavior only when run in an interactive terminal (php artisan tart:interactive-demo).