PhotoRec: add sector skip (+5%) and progress percentage

[poeggi]

• Press '+' during scan to skip ahead 5% of partition sectors, with confirmation prompt and log entry for the skipped range
• Progress bar now shows completion percentage next to sector count

[poeggi]

Anyone here and interested in this?

[poeggi]

Hi, just checking in -- any feedback on this PR? Happy to adjust if needed.

[poeggi]

Hi again -- I'd love to know if this is something you'd consider merging. The two changes are small and independent:

1. + skips ahead 5% instead of prompting to quit -- useful for very long scans where a region is clearly unrecoverable. Asks for confirmation before jumping and writes a log entry with the skipped sector range.
2. Percentage added to the progress line -- Reading sector X/Y (Z.z%) gives an immediate sense of progress without needing to do the math.

If the direction is right but the implementation needs adjusting, I'm happy to rework it. And if this isn't something you want in mainline, just say so -- that's useful to know too.