Grace999

Fixed bug where grace period remained active indefinitely if end time was in the past on server restart. Separated auto-start grace duration from the main grace duration to prevent unintended overwrites. Added a BossBar countdown visible to all players during the grace period showing remaining time. Added sound notification (Ender Dragon growl) to all players when the grace period ends. Made mob damage prevention during grace configurable and applied it to safe zones. Implemented per-world grace periods allowing grace to be toggled and configured separately per world. Introduced temporary safe zones with region claiming via /grace tools and /grace claim <name>. Provided special wooden pickaxe and shovel tools for region corner selection, only usable if given by the plugin. Added configurable flags for safe zones: block-breaking, block-placing, mob-damage, mob-spawning, and invincible-players (all disabled by default). Stored safe zone regions and flags persistently in a separate grace.yml file. Added commands to manage safe zones and flags: /grace <regionName> <flag> <true|false>. Improved messaging with action bar timers, titles, and cooldown messages to reduce spam. Added permission checks for all commands and features to ensure proper access control.