refactor: restructure Lighter SDK by removing deprecated Go files and enhancing Python documentation with new examples and models

docs/lighter/lighter-python-main/examples/sub_account_create.py

@@ -0,0 +1,17 @@
+import asyncio
+from utils import default_example_setup
+
+
+async def main():
+    client, api_client, _ = default_example_setup()
+
+    err = client.check_client()
+    if err is not None:
+        print(f"CheckClient error: {err}")
+        return
+
+    tx_info, response, err = await client.create_sub_account()
+    print(tx_info, response, err)
+
+if __name__ == "__main__":
+    asyncio.run(main())