docs: add some documentation for QUIC transport

examples/doc-examples/example_quic_transport.py

@@ -0,0 +1,35 @@
+import secrets
+
+import multiaddr
+import trio
+
+from libp2p import (
+    new_host,
+)
+from libp2p.crypto.secp256k1 import (
+    create_new_key_pair,
+)
+
+
+async def main():
+    # Create a key pair for the host
+    secret = secrets.token_bytes(32)
+    key_pair = create_new_key_pair(secret)
+
+    # Create a host with the key pair
+    host = new_host(key_pair=key_pair, enable_quic=True)
+
+    # Configure the listening address
+    port = 8000
+    listen_addr = multiaddr.Multiaddr(f"/ip4/0.0.0.0/udp/{port}/quic-v1")
+
+    # Start the host
+    async with host.run(listen_addrs=[listen_addr]):
+        print("libp2p has started with QUIC transport")
+        print("libp2p is listening on:", host.get_addrs())
+        # Keep the host running
+        await trio.sleep_forever()
+
+
+# Run the async function
+trio.run(main)