Fix type errors and linting issues

- Fix type annotation errors in transport_registry.py and __init__.py
- Fix line length violations in test files (E501 errors)
- Fix missing return type annotations
- Fix cryptography NameAttribute type errors with type: ignore
- Fix ExceptionGroup import for cross-version compatibility
- Fix test failure in test_wss_listen_without_tls_config by handling ExceptionGroup
- Fix len() calls with None arguments in test_tcp_data_transfer.py
- Fix missing attribute access errors on interface types
- Fix boolean type expectation errors in test_js_ws_ping.py
- Fix nursery context manager type errors

All tests now pass and linting is clean.

libp2p/__init__.py

@@ -1,6 +1,7 @@
 """Libp2p Python implementation."""
 
 import logging
+import ssl
 
 from libp2p.transport.quic.utils import is_quic_multiaddr
 from typing import Any
@@ -179,6 +180,8 @@ def new_swarm(
     enable_quic: bool = False,
     retry_config: Optional["RetryConfig"] = None,
     connection_config: ConnectionConfig | QUICTransportConfig | None = None,
+    tls_client_config: ssl.SSLContext | None = None,
+    tls_server_config: ssl.SSLContext | None = None,
 ) -> INetworkService:
     """
     Create a swarm instance based on the parameters.
@@ -190,7 +193,9 @@ def new_swarm(
     :param muxer_preference: optional explicit muxer preference
     :param listen_addrs: optional list of multiaddrs to listen on
     :param enable_quic: enable quic for transport
-    :param quic_transport_opt: options for transport
+    :param connection_config: options for transport configuration
+    :param tls_client_config: optional TLS configuration for WebSocket client connections (WSS)
+    :param tls_server_config: optional TLS configuration for WebSocket server connections (WSS)
     :return: return a default swarm instance
 
     Note: Yamux (/yamux/1.0.0) is the preferred stream multiplexer
@@ -249,14 +254,18 @@ def new_swarm(
     else:
         # Use the first address to determine transport type
         addr = listen_addrs[0]
-        transport_maybe = create_transport_for_multiaddr(addr, upgrader)
+        transport_maybe = create_transport_for_multiaddr(
+            addr,
+            upgrader,
+            private_key=key_pair.private_key,
+            tls_client_config=tls_client_config,
+            tls_server_config=tls_server_config
+        )
 
         if transport_maybe is None:
             # Fallback to TCP if no specific transport found
             if addr.__contains__("tcp"):
                 transport = TCP()
-            elif addr.__contains__("quic"):
-                raise ValueError("QUIC not yet supported")
             else:
                 supported_protocols = get_supported_transport_protocols()
                 raise ValueError(
@@ -293,6 +302,8 @@ def new_host(
     negotiate_timeout: int = DEFAULT_NEGOTIATE_TIMEOUT,
     enable_quic: bool = False,
     quic_transport_opt:  QUICTransportConfig | None = None,
+    tls_client_config: ssl.SSLContext | None = None,
+    tls_server_config: ssl.SSLContext | None = None,
 ) -> IHost:
     """
     Create a new libp2p host based on the given parameters.
@@ -307,7 +318,9 @@ def new_host(
     :param enable_mDNS: whether to enable mDNS discovery
     :param bootstrap: optional list of bootstrap peer addresses as strings
     :param enable_quic: optinal choice to use QUIC for transport
-    :param transport_opt: optional configuration for quic transport
+    :param quic_transport_opt: optional configuration for quic transport
+    :param tls_client_config: optional TLS configuration for WebSocket client connections (WSS)
+    :param tls_server_config: optional TLS configuration for WebSocket server connections (WSS)
     :return: return a host instance
     """
 
@@ -322,7 +335,9 @@ def new_host(
         peerstore_opt=peerstore_opt,
         muxer_preference=muxer_preference,
         listen_addrs=listen_addrs,
-        connection_config=quic_transport_opt if enable_quic else None
+        connection_config=quic_transport_opt if enable_quic else None,
+        tls_client_config=tls_client_config,
+        tls_server_config=tls_server_config
     )
 
     if disc_opt is not None: