RMBNametags

Features

• Added respect-invisibility option in config:
  Allows toggling whether invisible players’ names are hidden or shown when right-clicked.
• Added display-location option in config:
  Choose where to show the nickname — either in actionbar (default) or subtitle.

Fixes

• Code refactored for better readability and optimization.
• More reliable invisibility detection (potion effect + entity flags).
• Minor scoreboard handling improvements to avoid duplicate entries.