feat: swoole base image

[simonostendorf]

Closes #216

[Copilot]

Pull Request Overview

This PR migrates the application from using FrankenPHP to Swoole as the base image for the Laravel Octane server. The change switches from dunglas/frankenphp:1-php8.3-alpine to phpswoole/swoole:php8.3-alpine and updates all related configuration.

• Switches base image from FrankenPHP to Swoole
• Updates environment variables and startup command to use Swoole server
• Comments out Redis extension installation (likely already included in Swoole image)

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