🚀 Release v1.2.0 — Optimization, Safety & Major Overhaul

⚡ Performance & Optimization

Event-Driven Nametag Management: Replaced background periodic polling with an event-driven lifecycle (PlayerJoinEvent, PlayerRespawnEvent, PlayerChangedWorldEvent, PlayerGameModeChangeEvent), reducing idle CPU consumption to 0%.
Asynchronous Data I/O: Switched playerdata.yml writes to buffered asynchronous saving with an automatic synchronous flush during server shutdown (onDisable).
Modern Async Chat: Migrated chat input interception for HEX colors to Paper's Adventure-native AsyncChatEvent.
Component Pre-Caching: Static GUI icons and Adventure color representations are now pre-cached at startup to eliminate runtime allocations.

Line of Sight Verification: Added require-line-of-sight option (player.hasLineOfSight(target)) to prevent inspecting nametags through walls, doors, and obstacles.
Max Inspection Range: Added max-distance configuration option to limit the maximum interaction distance.
Vanish & NPC Filtering: Added automatic checks to ignore vanished staff members (canSee / vanished metadata) and NPCs (NPC metadata).
Sneak & Item Hand Rules: Added configurable flags to require empty hands, require clicker sneaking, or ignore sneaking targets.
Disabled Worlds: Added disabled-worlds list to exclude specific worlds (Hubs, Minigames) from nametag hiding and inspection.

Built-in PlaceholderAPI Expansion:
- %ctsn_color% — Returns the player's active custom color, HEX, or gradient specification.
- %ctsn_formatted_name% — Returns the player's name rendered with their active style and color.
Granular Permissions: Added permission nodes for individual color palette choices (ctsn.color.<color_name>) and gradients (ctsn.gradient).
Title Display Timings: Configurable fade-in, stay, and fade-out ticks for title mode in config.yml.
Folia Support: Added folia-supported: true flag in plugin.yml.

Instant Config & Locale Reload: /ctsn reload now instantly re-reads configuration and message files (messages_en.yml, messages_ru.yml) without server restarts.
Localized State Placeholders: Resolved hardcoded English strings in {state} (ON/OFF, ВКЛ/ВЫКЛ) and display mode announcements.
Tab Completion Permission Leaks: Fixed command suggestions exposing administrative subcommands to non-privileged players.
Chat Interception Fix: Fixed an issue where regular messages sent after the 60-second HEX prompt expiration were cancelled.