Fixed PAPI not being installed causing the plugin to crash and disable.

Bump version to 1.1 and add new inventory update method

Updated the project version from 1.0-SNAPSHOT to 1.1 in multiple files. Introduced a new method `updateAndRenderPersistentClickableSlot` in `DynamicPagedInventory` to enhance inventory slot management. This update ensures better support for dynamic inventory updates.

Add MySQL support for currency management and update economy configurationAdd MySQL integration for EconomyManager and database-backed currencies

Integrated MySQL support in EconomyManager to handle database-backed currencies, including a new method `setMySQL` for configuration. Implemented the `useDatabase` flag across currency operations, refactoring balance handling to accommodate both database and persistent data storage. Added updates to save and load currency database preferences in the configuration.

Removed a startup message that promoted my server - this was left in by mistake.

Manages everything from custom currencies
GUI's
Custom items and more.

Fixed fill for gui's.
added some extra functionality to the dynamic GUI's Class

Bug Fixes