Added FabledSkyblock clues:
- fabledskyblock_createisland(structure)
- fabledskyblock_deleteisland
- fabledskyblock_enterisland(islandowner)
- fabledskyblock_exitisland(islandowner)
- fabledskyblock_joinisland(islandowner)
- fabledskyblock_leaveisland(islandowner)
- fabledskyblock_level(level, points)
- fabledskyblock_visitisland(islandowner)

structure is the name of the structure used by the created island.

islandowner represents the name of the island owner

level & points represent a number. For example, setting a level of 25 would require at least a level of 25 to be met by the island. The level clue will be counted towards online players' scrolls when the /is level command has been run by an island member.