Refactor source layout

Introduce compat source sets and move all kotlin sources to the main directory

[no changelog]

src/main/kotlin/util/SkyBlockIsland.kt

@@ -0,0 +1,42 @@
+
+package moe.nea.firmament.util
+
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.descriptors.PrimitiveKind
+import kotlinx.serialization.descriptors.PrimitiveSerialDescriptor
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+import moe.nea.firmament.repo.RepoManager
+
+@Serializable(with = SkyBlockIsland.Serializer::class)
+class SkyBlockIsland
+private constructor(
+    val locrawMode: String,
+) {
+
+    object Serializer : KSerializer<SkyBlockIsland> {
+        override val descriptor: SerialDescriptor
+            get() = PrimitiveSerialDescriptor("SkyBlockIsland", PrimitiveKind.STRING)
+
+        override fun deserialize(decoder: Decoder): SkyBlockIsland {
+            return forMode(decoder.decodeString())
+        }
+
+        override fun serialize(encoder: Encoder, value: SkyBlockIsland) {
+            encoder.encodeString(value.locrawMode)
+        }
+    }
+    companion object {
+        private val allIslands = mutableMapOf<String, SkyBlockIsland>()
+        fun forMode(mode: String): SkyBlockIsland = allIslands.computeIfAbsent(mode, ::SkyBlockIsland)
+        val HUB = forMode("hub")
+        val PRIVATE_ISLAND = forMode("dynamic")
+        val RIFT = forMode("rift")
+    }
+
+    val userFriendlyName
+        get() = RepoManager.neuRepo.constants.islands.areaNames
+            .getOrDefault(locrawMode, locrawMode)
+}