Migrate the Carpet codebase to Mojang Mappings

src/main/java/carpet/script/CarpetExpression.java

@@ -17,21 +17,21 @@ import carpet.script.value.BlockValue;
 import carpet.script.value.EntityValue;
 import carpet.script.value.NumericValue;
 import carpet.script.value.Value;
-import net.minecraft.entity.Entity;
-import net.minecraft.server.command.ServerCommandSource;
-import net.minecraft.util.math.BlockPos;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.core.BlockPos;
+import net.minecraft.world.entity.Entity;
 
 public class CarpetExpression
 {
-    private final ServerCommandSource source;
+    private final CommandSourceStack source;
     private final BlockPos origin;
     private final Expression expr;
     // these are for extensions
     public Expression getExpr() {return expr;}
-    public ServerCommandSource getSource() {return source;}
+    public CommandSourceStack getSource() {return source;}
     public BlockPos getOrigin() {return origin;}
 
-    public CarpetExpression(Module module, String expression, ServerCommandSource source, BlockPos origin)
+    public CarpetExpression(Module module, String expression, CommandSourceStack source, BlockPos origin)
     {
         this.origin = origin;
         this.source = source;
@@ -60,7 +60,7 @@ public class CarpetExpression
                     with("x", (c, t) -> new NumericValue(x - origin.getX()).bindTo("x")).
                     with("y", (c, t) -> new NumericValue(y - origin.getY()).bindTo("y")).
                     with("z", (c, t) -> new NumericValue(z - origin.getZ()).bindTo("z")).
-                    with("_", (c, t) -> new BlockValue(null, source.getWorld(), new BlockPos(x, y, z)).bindTo("_"));
+                    with("_", (c, t) -> new BlockValue(null, source.getLevel(), new BlockPos(x, y, z)).bindTo("_"));
             Entity e = source.getEntity();
             if (e==null)
             {