errors: add ERR_INSPECTOR_COMMAND error

This error is used to propagate errors returned from the
inspector module's command system.

PR-URL: #26255
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Eugene Ostroukhov <eostroukhov@google.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: cjihrig

doc/api/errors.md

@@ -1159,6 +1159,11 @@ inspector was already connected.
 While using the `inspector` module, an attempt was made to use the inspector
 after the session had already closed.
 
+<a id="ERR_INSPECTOR_COMMAND"></a>
+### ERR_INSPECTOR_COMMAND
+
+An error occurred while issuing a command via the `inspector` module.
+
 <a id="ERR_INSPECTOR_NOT_AVAILABLE"></a>
 ### ERR_INSPECTOR_NOT_AVAILABLE
 

lib/internal/errors.js

@@ -706,6 +706,7 @@ E('ERR_INCOMPATIBLE_OPTION_PAIR',
   'Option "%s" can not be used in combination with option "%s"', TypeError);
 E('ERR_INSPECTOR_ALREADY_CONNECTED', '%s is already connected', Error);
 E('ERR_INSPECTOR_CLOSED', 'Session was closed', Error);
+E('ERR_INSPECTOR_COMMAND', 'Inspector error %d: %s', Error);
 E('ERR_INSPECTOR_NOT_AVAILABLE', 'Inspector is not available', Error);
 E('ERR_INSPECTOR_NOT_CONNECTED', 'Session is not connected', Error);
 E('ERR_INVALID_ADDRESS_FAMILY', 'Invalid address family: %s', RangeError);