feat(cli): add --connect-timeout flag to hermes mcp add

Persists as the server's connect_timeout in config, which the probe
now honors. CLI-flag portion of PR #54494; the probe-wrapper portion
was superseded by resolving connect_timeout inside _probe_single_server.

hermes_cli/mcp_config.py

@@ -397,6 +397,7 @@ def cmd_mcp_add(args):
     auth_type = getattr(args, "auth", None)
     preset_name = getattr(args, "preset", None)
     raw_env = getattr(args, "env", None)
+    raw_connect_timeout = getattr(args, "connect_timeout", None)
 
     server_config: Dict[str, Any] = {}
     try:
@@ -442,6 +443,8 @@ def cmd_mcp_add(args):
             server_config["args"] = cmd_args
         if explicit_env:
             server_config["env"] = explicit_env
+    if raw_connect_timeout is not None:
+        server_config["connect_timeout"] = raw_connect_timeout
 
     issues = validate_mcp_server_entry(name, server_config)
     if issues: