refactor!: Rename LaravelConfig to ConfigManager (v6.0.0)

[deligoez]

Summary

This is a major version release (v6.0.0) that renames the main LaravelConfig class to ConfigManager and restructures the facade to follow Laravel conventions.

Problem

IDEs auto-import TarfinLabs\LaravelConfig\LaravelConfig (the class) instead of the facade when developers type LaravelConfig::. This causes "non-static method called statically" errors that are confusing and time-consuming to debug.

Solution

• Rename LaravelConfig class to ConfigManager to prevent confusion
• Move facade to Facades/LaravelConfig following Laravel's naming convention
• The facade alias remains LaravelConfig, so existing code using the facade continues to work

Breaking Changes

Usage	Affected?	Notes
use LaravelConfig; (alias)	No	Works as before
read_config(), has_config() etc.	No	Works as before
app('laravel-config')	No	Works as before
new LaravelConfig()	Yes	Use new ConfigManager()
use TarfinLabs\LaravelConfig\LaravelConfig	Yes	Class no longer exists

Changes

Files Renamed/Moved

• src/LaravelConfig.php → src/ConfigManager.php
• src/LaravelConfigFacade.php → src/Facades/LaravelConfig.php

Updated Files

• src/LaravelConfigServiceProvider.php - Uses ConfigManager
• composer.json - Updated facade alias path, added PHP 8.5 support
• tests/LaravelConfigTest.php - Updated to use ConfigManager
• CHANGELOG.md - Added v6.0.0 entry with migration guide

New Tests

• Container binding resolution test
• Singleton behavior test
• Helper function tests (read_config, has_config, create_config, set_config_value)

Migration Guide

If you were directly importing the LaravelConfig class:

// Before
use TarfinLabs\LaravelConfig\LaravelConfig;
$config = new LaravelConfig();

// After
use TarfinLabs\LaravelConfig\ConfigManager;
$config = new ConfigManager();

If you were using the facade or helper functions, no changes are required.

Test Plan

• All 28 existing tests pass
• New tests for container binding and helpers pass
• Verified facade alias still works
• Verified helper functions still work