[Feature]: Implement fail-fast option

[SARDONYX-sard]

Expected behavior

When specifying a dir, you may want to stop immediately if an error occurs, or you may want other files to be converted even if an error occurs.

I would like to have an option to allow users to choose this pattern.

Implementation ideas

The existing one is already failFast, so all we need to do is use join_all in featuers and then join the err from vec.

other

No response