Move Purpur config in /config folder & split configs

[NoltoxGit]

Hello,
I’m an admin on a Minecraft server using Purpur a long time ago, and I’d like to suggest an improvement inspired by "recent" (even if it's been a while now) changes made by PaperMC regarding configuration management.

Recently, PaperMC moved its configuration files to the config folder at the root of the server and split the settings into two separate files:

config/paper-global.yml: Contains general configurations (unrelated to world-specific settings).
config/paper-world-defaults.yml: Includes configurations that affect worlds, such as enabling/disabling anti-x-ray and other world-related options.

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My suggestion is for Purpur to adopt a similar structure:

Move a part of Purpur config in config/purpur-global.yml file in the config folder to store all general settings not tied to specific worlds.
Move a part of Purpur config in config/purpur-world-defaults.yml file, also in the config folder, to organize world-related settings.

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This structure would make configuration management more organized and user-friendly. It would also align Purpur’s approach with PaperMC’s, creating consistency in how settings are handled.

Thank you for considering this suggestion! :)