feat: add gradio only file

Author: ketsapiwiq

demo.py

@@ -0,0 +1,15 @@
+import gradio as gr
+from languia.block_arena import demo
+from languia import config
+
+# Ensure static paths are set correctly
+gr.set_static_paths(paths=[config.assets_absolute_path])
+
+# Launch the Gradio app directly
+if __name__ == "__main__":
+    demo.launch(
+        root_path="/arene",
+        server_name="0.0.0.0",
+        server_port=7860,       # Default Gradio port
+        share=False,            # Set to True if you want to create a shareable link
+    )