Refactor as a single-class bundle

[GromNaN]

What:

• Bug Fix
• New Feature

Description:

• Add configuration for project and base_uri.
• Convert the bundle to a single bundle class
• Remove compatibility with unsupported Symfony versions. Keep only 6.4 and 7.3
• Add support for Symfony 8.0

Related:

[Copilot]

Pull Request Overview

This PR refactors the OpenAI Symfony bundle from a traditional bundle structure to a single-class bundle using Symfony's AbstractBundle. It removes support for older Symfony versions (5.4, 6.3) and adds support for Symfony 8.0, while introducing additional configuration options for project and base_uri.

Key changes:

• Consolidates bundle functionality into a single OpenAIBundle class extending AbstractBundle
• Adds project and base_uri configuration options
• Updates Symfony version constraints to support only 6.4, 7.3+, and 8.0

Reviewed Changes

Copilot reviewed 11 out of 12 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/OpenAIBundle.php	Refactored to extend AbstractBundle with embedded configuration and service registration
tests/OpenAIBundleTest.php	New integration test using Symfony kernel to test the complete bundle
src/DependencyInjection/OpenAIExtension.php	Removed - functionality moved to OpenAIBundle
src/DependencyInjection/Configuration.php	Removed - configuration moved to OpenAIBundle
src/Resources/config/services.php	Removed - service configuration moved to OpenAIBundle
tests/DependencyInjection/OpenAIExtensionTest.php	Removed - replaced by integration test
composer.json	Updated Symfony version constraints and dev dependencies
.github/workflows/tests.yml	Updated CI matrix to test only supported Symfony versions

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