Introduce a new variable in hermit add

This makes it more descriptive, allowing me to be isolated from which
file has the suffix.

The goal is to make it so that the file with the suffix is actually the
complete file, so we can avoid having to rename a file in the case of
redacting a committed file.
Have redaction remove the file and relink it

This lays more groundwork for changing which file has a suffix
Fix little typo in add redaction logic
Change formatting of ignoring message
Change hermit add to run git add