Possibility to rename ADR using cli

[smartfin]

adr-tools is an awesome tool to communicate around ADR inside the team. It doesn't put a lot of constraints on text, naming but at the same time provides useful features to generate init files, list ADRs, etc.

I think it would be nice to have the option to rename the existing piece. Of course, it always doable by renaming file and title manually, but a bit more automation might be useful for users.