fix: correct Stonecutter API usage and BetterHUDGUI preprocessor syntax

- build.gradle: use project.minecraft_version instead of the
  non-existent stonecutter.current.version property
- build.gradle: remove stonecutter.chiseled call that used incorrect
  task API and caused a configuration-phase crash
- BetterHUDGUI.java: replace invalid //?>  with proper //? if block
  for the class declaration implements clause

https://claude.ai/code/session_01PHDS24JTjD32guufn2q2sj

Author: claude

build.gradle

@@ -4,7 +4,7 @@ plugins {
 	id 'maven-publish'
 }
 
-def mc = stonecutter.current.version
+def mc = project.minecraft_version
 def isOldMC = mc.startsWith("1.")  // 1.21.x → Yarn mappings, Java 21
 def is121 = mc == "1.21"           // Only 1.21 needs lifecycle-events as explicit module
 
@@ -106,9 +106,6 @@ jar {
 	}
 }
 
-// Registers a root-level task that builds all versions sequentially
-stonecutter.chiseled tasks.register("chiseledBuild", stonecutter.task(tasks.named("build")))
-
 publishing {
 	publications {
 		create("mavenJava", MavenPublication) {

src/main/java/dsns/betterhud/BetterHUDGUI.java

@@ -17,10 +17,11 @@
 import net.fabricmc.fabric.api.client.rendering.v1.HudRenderCallback;*/
 //?}
 
-public class BetterHUDGUI
-    //? if mc >= "26.1"
-    implements ClientTickEvents.StartTick {
-    //?> /*implements HudRenderCallback, ClientTickEvents.StartTick {*/
+//? if mc >= "26.1" {
+public class BetterHUDGUI implements ClientTickEvents.StartTick {
+//?} else {
+/*public class BetterHUDGUI implements HudRenderCallback, ClientTickEvents.StartTick {*/
+//?}
 
     public static int verticalPadding = 4;
     public static int horizontalPadding = 4;