Change Prism Launcher default install folder to be dotless

installer/src/main/kotlin/gg/essential/installer/launcher/prism/PrismInstallation.kt

@@ -16,6 +16,7 @@
 package gg.essential.installer.launcher.prism
 
 import gg.essential.installer.launcher.Installation
+import java.nio.file.Files
 import java.nio.file.Path
 import kotlin.io.path.div
 
@@ -25,7 +26,21 @@ class PrismInstallation(
     instanceFolder: Path,
     val config: InstanceConfig,
     pack: MMCPack,
-) : Installation(id, launcher, config.name, pack.mcVersion, pack.modloaderInfo, instanceFolder / ".minecraft") {
+) : Installation(
+    id,
+    launcher,
+    config.name,
+    pack.mcVersion,
+    pack.modloaderInfo,
+    // Prism has always supported both .minecraft and minecraft folders, which was previously missed by us...
+    // But they have since switched to using the dotless folder as default so we should do the same.
+    // We mirror the Prism Launcher behaviour exactly:
+    // https://github.com/PrismLauncher/PrismLauncher/blob/e0c569365f39ac6277c645ed26ce2ccff6a3a4ae/launcher/minecraft/MinecraftInstance.cpp#L349
+    if(Files.exists(instanceFolder / ".minecraft") && Files.notExists(instanceFolder / "minecraft"))
+        instanceFolder / ".minecraft"
+    else
+        instanceFolder / "minecraft"
+) {
 
     override fun compareTo(other: Installation): Int {
         if (other !is PrismInstallation) return 0 // We can't really compare, nor should we even anyway

installer/src/main/kotlin/gg/essential/installer/launcher/prism/PrismLauncher.kt

@@ -126,7 +126,7 @@ class PrismLauncher(
     }
 
     override fun getNewGameDataFolder(name: String): Path {
-        return appendInstallNameToPath(instancesFolder, name) / ".minecraft"
+        return appendInstallNameToPath(instancesFolder, name) / "minecraft"
     }
 
     override fun getNewInstallInfo(name: String, modVersion: ModVersion, mcVersion: MCVersion, modloader: Modloader, modloaderVersion: ModloaderVersion): PrismInstallInfo.New {