Re-level non-docs content to top of repo and rename content→docs

_code-samples/quickstart/py/mod5.py

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+import xrpl
+from xrpl.clients import JsonRpcClient
+from xrpl.wallet import Wallet
+testnet_url = "https://s.altnet.rippletest.net:51234"
+
+
+def broker_sale(seed, sell_offer_index, buy_offer_index, broker_fee):
+    """broker_sale"""
+    broker_wallet=Wallet.from_seed(seed)
+    client=JsonRpcClient(testnet_url)
+    accept_offer_tx=xrpl.models.transactions.NFTokenAcceptOffer(
+       account=broker_wallet.classic_address,
+       nftoken_sell_offer=sell_offer_index,
+       nftoken_buy_offer=buy_offer_index,
+       nftoken_broker_fee=broker_fee
+    )
+# Submit the transaction and report the results
+    reply=""
+    try:
+        response=xrpl.transaction.submit_and_wait(accept_offer_tx,client,broker_wallet)
+        reply=response.result
+    except xrpl.transaction.XRPLReliableSubmissionException as e:
+        reply=f"Submit failed: {e}"
+    return reply