Add Language Switcher / 言語切替機能追加

[askdkc]

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[what-the-diff]

PR Summary

• Installation Guide for Language Switch Feature
  The README.md file now has a new section outlining how to install a feature that allows users to switch languages.

• New Trait for Language Switching
  We've introduced InstallLanguageSwitcher in BreezejpCommand.php. This piece of code will enable the application to handle language switching functionalities.

• New Files for Language Switching Commands
  In the Commands directory, we've added a new file called InstallLanguageSwitcher.php which contains instructions that the system will follow when installing the language switcher feature.

• New Middleware for Localization
  Added a file Localization.php in the stubs/app/Http/Middleware directory. This is a middleware file, which helps manage the flow of processing requests and responses in our system, specifically tailored for localization (supporting multiple languages).

• Adding Route for Language Switching
  A new web.stub file in the stubs/default/routes directory. This file establishes a new route, providing a way for the application to respond when users want to switch languages.

• Kernel Configuration Updates
  We've also created Kernel.stub in stubs/app/Http directory. This allows us to update our system's kernel configurations specifically needed for the newly added features.

Please note that the "stub" files mentioned above are template files used as a base for generating new files.