Fuji (Essentials)

Read detailed change logs in https://github.com/sakurawald/fuji/commits/dev/

• [top_chunks] fix: failed to open the GUI using /chunks command.
• [top_chunks] fix: should respect the top.rows and top.columns options, while display the Top Chunks GUI.
• [top_chunks] fix: should attach the nearest players into chunk scores while displaying the Top Chunks GUI.
• [core] feature: simplify the language system, and enhance the debug messages for language system. (Make it easier to debug.)