feat: allow bulk renaming to include trailing content in addition to the required new names

[MikuGeek]

When handling numerous filenames, it's better to give indication to original filenames. I've added the original filenames below, separated by a divider, without changing the code related to renaming.

[sxyazi]

This doesn't make sense. Not everyone wants the file names to appear twice, and you can already achieve this through custom bulk rename commands:

[[opener.bulk-rename]]
block = true
run = '''
  s="$(cat "$1")"
  echo "$s\n------\n$s" > "$1"
  nvim "$1"
  sed -i "" "$(wc -l <<< "$s")q" "$1"
'''

[[open.prepend_rules]]
name = "bulk-rename.txt"
use  = "bulk-rename"

However, I can accept removing the strict restriction that the new and old file lists must have the same length, and instead just read the first n lines.

This way, you wouldn't need the final sed -i to remove the separator from the end of the file, which could make implementing such customizations more convenient.

[MikuGeek]

Thanks for the reminder. I apologize for not fully reading the documentation. I've modified the bulk rename logic; it truncates when the number of new filenames exceeds the number of old filenames, but the rest of the logic remains the same.

[sxyazi]

Thank you!