New features:
• Reset to default button added in the color GUI (slot 35, configurable in gui/colors-gui.yml). Clicking it clears the player’s chat color and restores default (no plugin color).
Added 5 admin commands:
- /perfchatcolors give <player> <color> — unlock a color for any player (online or offline)
- /perfchatcolors revoke <player> <color> — remove a color; resets active color if it was selected
- /perfchatcolors reset <player> — wipe all unlocked colors and reset active color
- /perfchatcolors setactive <player> <color> — force-set active color without purchase check (use "none" to reset); works offline
- /perfchatcolors info <player> — display active color and full list of unlocked colors
