Fixed typos in the dialogues of various shopkeepers
Individualized Varrock, Lumbridge, and Port Phastmys General Store to their own file
Marked Fairy Shopkeeper as a shopkeeper so players can interact with her too (previously only the assistant was working)
Unified kotlin and java into just src/main
Unified the rs09 and core packages
Took all content out of the core package, and placed it into the new content package
Reorganised all source code relating to content to be easier to find and explore