Move literals to the RHS of an add/sub expression

The BinaryExprTransformer deals with this to an extent. However, it
requires multiple passes to do so. Adding support to AddSubTransformer
allows it to be done in a single pass.

Signed-off-by: Graham <gpe@openrs2.dev>

deob-ast/src/main/java/dev/openrs2/deob/ast/transform/AddSubTransformer.kt

@@ -4,6 +4,7 @@ import com.github.javaparser.ast.CompilationUnit
 import com.github.javaparser.ast.expr.BinaryExpr
 import com.github.javaparser.ast.expr.Expression
 import com.github.javaparser.ast.expr.IntegerLiteralExpr
+import com.github.javaparser.ast.expr.LiteralExpr
 import com.github.javaparser.ast.expr.LongLiteralExpr
 import com.github.javaparser.ast.expr.UnaryExpr
 import dev.openrs2.deob.ast.Library
@@ -48,6 +49,15 @@ class AddSubTransformer : Transformer() {
                     return@Comparator -1
                 }
 
+                // push literals to the right
+                val aLiteral = a is LiteralExpr
+                val bLiteral = b is LiteralExpr
+                if (aLiteral && !bLiteral) {
+                    return@Comparator 1
+                } else if (!aLiteral && bLiteral) {
+                    return@Comparator -1
+                }
+
                 return@Comparator 0
             })