Added

• Implemented group-based taxing functionality, allowing tax rates to be set per permission group using /eztax settaxrate <rate> [group].
• Added new command messages for group-specific tax rate setting in messages.yml and language files.

Fixed

• Updated all message placeholders from legacy {placeholder} format to MiniMessage <placeholder> format in messages.yml and all language files (messages_en.yml, messages_de.yml, messages_es.yml, etc.) to ensure proper placeholder replacement.
• Corrected the placeholder documentation comment in messages.yml to reflect the new format.

Changed

• Improved message formatting consistency across all language files to use MiniMessage standards.