[Feature Request] Make git commit co-author footer configurable per project

Bug Description
Claude code, by default, inserts a "Co-authored-by" footer in git commits. Several significant software projects, including the Linux foundation have concluded that this is an inappropriate tag to use for agent assisted work. The Linux kernel project specifically has agreed on "Assisted-by" as the appropriate (and in that case, required tag). I have had mixed success overriding this tag through CLAUDE.md and found the Co-authored-by sometimes sneaks in anyway. Is it worth making this a bit more configurable, ideally per project. This is based on an assumption that it is in the system prompt being used, and could easily be changed to a different tag.