[FR] verify file before starting actually printing

[BloodyRain2k]

Is your feature request related to a problem? Please describe.

I've been occasionally running into the issue that the SD card I'm using for my CR-6 randomly corrupts the file.
Not sure if it's the card itself or Windows not properly letting go of it after unmounting or whatever, but it happens too rarely to throw the card away.

So I was wondering if it would be possible for the firmware to verify that the chosen file can be read fine from start to finish.
Yesterday I was very lucky, because the print failed right at the beginning during the priming pattern I use.

I don't know how much trouble it would be for the firmware, to run through the file twice, on the first just verifying that the command is a proper command and not gibberish, and in the case all lines are fine actually start the print as usual after that.

Are you looking for hardware support?

No response

Describe the feature you want

If feasible, the firmware should verify the file before starting the print, to ensure it can be read from start to finish.

If the process takes a while (since I have no idea about the reading speed of the printer), maybe it could be done during the warm up phase, and show on the display something like "verifying: line 1/xxx".