this changes and fixes some things

Bug Fixes

• Fixed a bug exclusive to 1.21.8 where text in nameplates would appear completely invisible.
• Fixed a bug where advancements wouldn't be changed due to the wrong event being used.
• Changed the text alignment from "left" to "center".

Other Changes

• Replaced most chat-related changes with the "overrideFormats" option.
• Added comments in the Skript that explains what certain things do, along with some easter eggs.
• Added /nicktinfo, which tells the command executer general information about the Skript.

please let me know if you find any issues!