Moved "isFolia" to main module to avoid error on java version under 1.21

Also moved folia scheduler to another nms module allowing support of folia 1.20.4

src/main/kotlin/xyz/alexcrea/cuanvil/dependency/DependencyManager.kt

@@ -25,7 +25,7 @@ object DependencyManager {
         val pluginManager = Bukkit.getPluginManager()
 
         // Bukkit or Paper scheduler ?
-        isFolia = FoliaScheduler.isFolia()
+        isFolia = testIsFolia()
         scheduler = if(isFolia) {
             CustomAnvil.instance.logger.info("Folia detected... Custom Anvil Folia support is experimental. issues are more likely to happens.")
 
@@ -92,4 +92,14 @@ object DependencyManager {
         return bypass
     }
 
+
+    private fun testIsFolia(): Boolean {
+        try {
+            Class.forName("io.papermc.paper.threadedregions.RegionizedServer")
+            return true
+        } catch (e: ClassNotFoundException) {
+            return false
+        }
+    }
+
 }