Refactor tests and add logging utility in Castle class

Refactor methods to use camelCase naming convention.

Expand database instance range in setup logic

Refactor table class and add snake_case conversion.

Refactor logging system with structured log levels defined PSR-3

Merge remote-tracking branch 'origin/rainfrog-2' into Rainfrog-2

Remove deprecated class alias for PHPUnit.

Update README.md

Upgrade to Rainfrog 2.0 with middleware support.

Refactor class names and improve autoloader logic.

Update README with enhanced details and bilingual support

Version 1.3

Version 1.2

Refactor logging condition in database implementation

セッションローテーションの改善