Elite Holograms

Key Updates in This Version:

- NEW - Comprehensive Placeholder System:
    - Server-Wide Placeholders (Show the same for all players):
        * %players% - Current online player count
        * %maxplayers% - Server maximum players
        * %tps% - Server TPS (Ticks Per Second)
        * %uptime% - Server uptime in HH:MM:SS format
        * %memory% - Memory usage in "used/max MB (percentage%)" format
        * %server_time% - Real world time in HH:MM:SS format
    - Player-Specific Placeholders (Unique for each viewer):
        * %player% - Player's display name
        * %player_rank% - Player's rank (from LuckPerms/FTB Ranks, or "OP"/"Player" fallback)
        * %player_health% - Current/max health (e.g., "20.0/20.0")
        * %player_level% - Experience level
        * %player_world% - World name (Overworld/Nether/End/custom)
        * %player_coords% - X, Y, Z coordinates
        * %player_gamemode% - Game mode (Creative/Survival/Adventure/Spectator)

- NEW - Advanced Permission System:
    - Full integration with LuckPerms and FTB Ranks.
    - Granular permission nodes (e.g., eliteholograms.create, eliteholograms.edit) for precise command control.
    - OP level 2 fallback if no permission mod is detected.
    - (Refer to PERMISSIONS.md for setup details).

- NeoForge 1.21.1 (Neo21) Fixes & Improvements:
    - Resolved issues where holograms appeared as visible armor stands for other players.
    - Improved synchronization of player-specific placeholders for all viewers.
    - Enhanced stability of hologram rendering in multiplayer.

- General Improvements:
    - Tab completion for all relevant commands and parameters.
    - Continued improvements to placeholder processing and error handling.
    - Robust server shutdown procedures to prevent issues.