New Feature - Painting Table Support

• Added support for KawaMood's Painting Table datapack alongside Kawamood's Waystones datapack. The barrel timing fix now applies to Painting Tables using the same fix.
• Painting Table entries are cached the same way as Waystones in the plugin data folder.
• Painting Table placement and removal is detected the same way as Waystones.

Updated Datapack Detection

• Both datapacks will be detected during startup and on /pkfix reload. If one of the datapacks is not installed then the barrel timing fix for that datapack is inactive and no scan is attempted.
• Both detection results are reported in console on startup and on /pkfix reload.

Stuck Lock Fixed

• Some users were experiencing a locked Waystone after opening and closing it. The barrel timing fix would sometimes leave the Waystone locked so I've changed the timing as to when the barrel is unlocked to resolve that issue. This shouldn't require players to relog or move 20 blocks away anymore.