BlueMap Banners

New Stuff

• Add commands to configure settings
• Add translation support for en_us and de_de
• Add an option to add markers instantly on banner place #5
• Rename marker list labels to "BlueMap Banners" and add a compatibility script to migrate old data

Changes

• Update to Minecraft 1.21.9
• Update BlueMap dependency
• Improve README.md and add images
• Fix global notifier using a wrong config identifier
• Fix wrong world reference #9
• Fix GitHub actions artifact not uploading