Error improvements

[novemberborn]

• Error detection fails when custom errors have a different string tag representation: Error message gets swallowed when Symbol.toStringTag is implemented avajs/ava#3161
• cause is not formatted / compared: Add Error .cause property to output avajs/ava#3186

[novemberborn]

See also #77.

[gebsh]

Additionally to cause, some built-in errors contain more non-enumerable properties:

• AggregateError has errors.
• SuppressedError (available since Node 24) has error and suppressed.

I briefly looked at the linked PR, but I couldn't find code that would handle them. Assuming I didn't miss anything, could support for these properties be added as well?

[novemberborn]

@gebsh I've added it to my list, there's a whole bunch of globals that need special handling because they use non-enumerable properties.