Fix/fix folia issues and persistentce

[TheBjoRedCraft]

No description provided.

[Copilot]

Pull request overview

This PR addresses Folia compatibility issues and fixes NPC persistence bugs in the surf-npc plugin. The changes include adding proper persistence checks before saving NPCs, fixing a missing entityType field in the save method, improving listener architecture by converting them to Kotlin objects, and adding Folia support through the Canvas API.

Changes:

• Fixed NPC persistence to prevent non-persistent NPCs from being saved to disk
• Fixed missing entityType field in NPC save method
• Added Folia support through Canvas API with conditional listener registration
• Converted Bukkit event listeners from classes to objects (Kotlin best practice)
• Improved example plugin robustness by using dynamic world name instead of hardcoded value

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
surf-npc-paper/src/main/kotlin/dev/slne/surf/npc/paper/service/StorageService.kt	Added persistence check guard and fixed missing entityType field in save method
surf-npc-paper/src/main/kotlin/dev/slne/surf/npc/paper/listener/WorldChangeListener.kt	Converted from class to object for singleton pattern
surf-npc-paper/src/main/kotlin/dev/slne/surf/npc/paper/listener/InternalNpcEventListener.kt	Converted from class to object for singleton pattern
surf-npc-paper/src/main/kotlin/dev/slne/surf/npc/paper/listener/FoliaAdditionsListener.kt	New listener for handling Folia-specific teleport events through Canvas API
surf-npc-paper/src/main/kotlin/dev/slne/surf/npc/paper/listener/ConnectionListener.kt	Converted from class to object for singleton pattern
surf-npc-paper/src/main/kotlin/dev/slne/surf/npc/paper/PaperMain.kt	Updated listener registration, added Canvas server detection, and conditional Folia listener registration
surf-npc-paper/build.gradle.kts	Added Canvas API dependency and repository with proper capability resolution
surf-npc-example-dsl/src/main/kotlin/dev/slne/surf/npc/example/SurfNpcExamplePlugin.kt	Changed hardcoded world name to dynamic retrieval for better robustness
gradle.properties	Bumped version from 1.6.0 to 1.6.1

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