Adding FunctionTranspilerNode which will replace SLIFO ranges

smojol-core/src/main/java/org/smojol/common/transpiler/FunctionTranspilerNode.java

@@ -0,0 +1,19 @@
+package org.smojol.common.transpiler;
+
+import com.google.common.collect.ImmutableList;
+import org.smojol.common.ast.SemanticCategory;
+
+public class FunctionTranspilerNode extends TranspilerNode {
+    private final String name;
+    private final TranspilerCodeBlockNode body;
+
+    public FunctionTranspilerNode(String name, TranspilerCodeBlockNode body) {
+        super(ImmutableList.of(body), ImmutableList.of(SemanticCategory.FUNCTION));
+        this.name = name;
+        this.body = body;
+    }
+    @Override
+    public String description() {
+        return String.format("function %s()\n%s", name, body.description());
+    }
+}